An Abundance of Katherines

When it comes to relationships, everyone has a type. Colin Singleton’s type is girls named Katherine. He has dated–and been dumped by–19 Katherines. In the wake of The K-19 Debacle, Colin–an anagram-obsessed washed-up child prodigy–heads out on a road trip with his overweight, Judge Judy- loving friend Hassan. With 10,000 dollars in his pocket and a feral hog on his trail, Colin is on a mission to prove a mathematical theorem he hopes will predict the future of any relationship (and conceivably win the girl).An Abundance of Katherines was a 2007 Michael L. Printz Honor book and a finalist for the Los Angeles Times Book Prize. It was also named one of the books of the year by Booklist, Horn Book, and Kirkus.

If you are fully prepared to be inundated with spoilers, you can learn much, much more about Katherines at the book’s Questions page.

If you would like to read this book in another language, go to the Translations page.

Reviews (Spoiler Alert!)

“Imagine an operating room at the start of a daring but well-rehearsed procedure and you will have something of the atmosphere of ”An Abundance of Katherines”: every detail considered, the action unrolling with grace and inevitability.”

-New York Times Book Review

“Green follows his Printz winning Looking for Alaska (2005) with another sharp, intelligent story. The laugh-out-loud humor ranges from delightfully sophomoric to subtly intellectual.”
-Booklist, Starred Review

“Fully fun, challengingly complex, and entirely entertaining.”
-Kirkus, Starred Review

“Laugh-out-loud funny, this second novel by the author of the Printz winner Looking for Alaska charts a singular coming-of-age American road trip that is at once a satire of and a tribute to its many celebrated predecessors.”
-Horn Book, Starred Review

{ 296 comments… read them below or add one }

Ane January 10, 2014 at 7:52 pm

Dear John,

The simple fact that you mention Basques (on the 50th page (in my edition, at least)) has made me realize that you are even more awesome than I thought.

Eskerrik asko eta horrela jarraitu! (“Thank you and keep up the good work”, in Basque)


Reply January 12, 2014 at 1:35 pm

I’m not that much of a internet reader to be honest but your sites
really nice, keep it up! I’ll go ahead and bookmark your site to come back in the future.


Haley January 12, 2014 at 2:44 pm

The absolute FUNNIEST book I’ve ever read!!


Rachael March 28, 2014 at 4:46 pm

OH MY GOSH YES. I literally had to restrain my laughter and even then, people were asking if I was okay. I just nodded and smiled, eyes watering. It was perfect. I laughed until I cried. <3


Same person who said Anon on tfios April 4, 2014 at 8:02 pm



Hannah January 13, 2014 at 12:04 pm

Colin is super duoer funny. Hahaha! Yeah, he seems a little bit crazy but that’s because he’s obsessed with Katherine. And I really love the plot of the story. He’s such a genius.


Amanda March 9, 2014 at 6:28 pm

Not a genius- a prodigy ;)


Kasey April 14, 2014 at 3:28 am

Omg Amanda yes! I love coming on this site because i feel like I actually belong ;-;


make dubstep on android January 15, 2014 at 2:49 am

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Alannah Grasso January 20, 2014 at 1:55 am

Dear John Green,
you are the best writer ,I cannot stop reading your books they are number 1.
Thank-you for making me like reading books and I cannot stop reading your books now. you make your books so interesting and not boring. Please keep writing.


Rachael March 28, 2014 at 4:44 pm

I honestly don’t think he can ever STOP writing. It’s become an inherent part of him, as it does for ALL nerdfighters (; I don’t think we have to worry about this anytime soon! (:


TJ January 22, 2014 at 3:13 pm

Mr. Green,

Most likely you will not see this message, but if you do, I will legitimately explode into a billion tiny particles of happiness. As you have already guessed, I am an avid reader of all of your books. I am not ashamed to say I have read “The Fault in our Stars” about 33 times. 15 times over my past summer break. Yes, I have no life.

But I just wanted to say: thank you. I have been extremely stressed with my grades and school and parents and bullies and everything in between, but thank you. Your books make me smile unconsciously (and cry oops), but they keep me happy during this stressful period of middle school. Sure, I might admit to not having friends and only interacting fully with people over the Internet, and I have no idea where I am leading you with this message. All I wanted to say was: keep writing brilliantly planned books and keep doing Vlogbrother videos (which are a guilty pleasure of mine, to stay up until 3;37 am and watch them until I’m crying and laughing into my pillow). But yes, thank you for the 925492659262592353278597296932nd time.

A fellow Nerdfighter,



AJ February 9, 2014 at 8:36 pm

That was brilliantly written, my friend. You have an impeccable sense of voice. Write a book.


Eby March 26, 2014 at 8:09 pm

Yeah man, AJ’s true, that was well written indeed.”Write a Book”


Alice♠ April 5, 2014 at 8:09 pm

You shouldn’t mind if John doesn’t see this. We, all the nerfighters, are here to speak, to express, to complain about the douches for each other. Thank you to John Green, bringing all these people together, uniting them in one colossal family. (Like Colin, I can’t seen to keep my ideas straight, so here goes…)

The fact that we have read this book connects us in so many ways. It changes what we will do in life, what we will see, what we will love. We, the nerdfighters, shall stand mighty and tall over the bullying swines! Now, TJ, if you ever abandon writing, remember why you started. Because people loved what you wrote, what you expressed, what you meant. We are all behind you, not materialistically, but still with you. Vanquish the bullies, you are better than them! Even though I don’t know you, I want you to write a book about a big family. A family that made you start this book. About all of us. Keep on keepin’ on and don’t give in to stress!! We are here!



Kasey April 14, 2014 at 3:30 am

Can I just say i love all of you hald as much as I love john Green? Okay? Okay (heheh)


Kaylen January 23, 2014 at 11:00 pm

I finished reading this book today, and it was hilarious. *SPOILERS* I love Colin and Lindsey, although them getting together was kind of predictable. I still loved the book. The characters were so real, and I could relate to some of the characters, even Colin, and I am not a prodigy. I didn’t really get the difference between prodigy and genius before, but now I know, so thank you for that. I am hoping to read more of your books, this is actually the first one I’ve read. I would like to read The Fault in Our Stars soon. This was an awesome book, and I am hoping to pick up The Fault in Our Stars next time I see it, and I know I am going to cry during it but my friends told me it was one of their favorite books of all time, so it will be worth the tears.
Thank you for writing this book, I loved it.



Karen Grace Hassanieh January 25, 2014 at 3:20 am

Dear Mr. Green,
I am a middle school student. Just finished reading An Abundance of Katherines. It is the second book that I have read from your collection. I truly enjoyed reading your books! My book club teacher has asked me to write a review of your book An Abundance of Katherines!

Poor Colin, always getting into relationships and always getting dumped. How bad is he with his relationships? Well, Colin dated exactly 19 girls all named Katherine in which they all abandoned him. After dealing with the departure of Katherine #19, Colin goes through depression. He starts vomiting at random, does not talk to his parents and starts crying whenever he starts thinking about Katherine #19. This all changes when his best friend named Hassan, an over-weight, Lebanese, Judge Judy fan appears and invites him for a road trip to god knows where, and to forget about his depression and the Katherines. An Abundance of Katherines is like a roller coaster ride. Both provide a heavy dose of entertainment, excitement and pleasure. But in this case, An Abundance of Katherines grants more humor than any roller coaster!

Thank you for being such a great writer I would love to hear from you!

Kindest regards,
Karen Grace


liam January 26, 2014 at 8:36 pm

can’t wait to read your obituary so breathing room can be made for a more caring writer can come along and teach these ‘young adults’ how soon the whole world is going to come crashing down on them. but then, maybe i’m just jealous.


Kathryn Stephan January 27, 2014 at 12:27 am

This was the first book I read, mainly because my name is Kathryn. I thought it was absolutely marvellous and could not put it down. This book started my crazy “I must buy all of John Green’s books” craze that drives people crazy. I think you are a fabulous writer. That’s all there is to it. I don’t really have much to say other than please keep writing!

Kathryn Stephan


Senaida Ng January 27, 2014 at 11:16 pm

Hi! If you read this, I want you to know that you’re books absolutely inspire me and you are totally awesome!! I would really love to meet u (tho i dont think that is possible) anyways I read TFIOS like 100 times (or more) and you’re books are sooooooo funny!! I decided to start being anagram-crazy and the idea to memorize pi (mentioned in An Abundance of Katherines) I’ve never thought of it like that, although I did memorize the first 40 digits of pi. Bottom line: I love love love love you’re books (present tense) Thank you soo much and keep writing!!

with love (to the books and to you)
Senaida Ng

Reply January 28, 2014 at 10:32 am

Basically, all berries consist of antioxidants and nutriments thus will help with removing weight.
s all to easy to unconsciously do hurt to oneself by making poor meal choices.
Maybe your physician must have exchanged my
report with someone else.


Roisin February 4, 2014 at 3:58 am

absolutely loved this book, finished it about 10 minutes ago and had to tell everyone how much I loved it! I loved the plot, it was so different to book I have read before! and it was actually hilarious at times :’) it’s funny though, I can’t remember the last time I met a Katherine (if I even have ever!)



I am currently reading an Abundance of Katherines and it is amazing, Thank you for being such an amazing author and a great roll model. (Also, My girlfriends name is Kathryn, Which is kinda funny…)


Cixous February 7, 2014 at 11:40 am

This book really helped me out of a dark time. I was going through a bad time (something similar to Collin) and this had me laughing for the first time in a long time. I tore through this book in one day and then reread it the next day. It’s my favorite John Green book and possibly my favorite book.

So, Mr. John Green, thank you so much for reeling me out of my dark tunnel and taking me on a glorious road trip.

Thank you for adding a little smile into my life.


Anna February 15, 2014 at 10:46 am

Mr. Green,

You are absolutely superb! I read An Abundance of Katherines for my novels class and loved it. I just finished it and now want to go on a random road trip packet with all of your books in my backpack. Thank you for being such a fantastic writer.



Cansu Akin February 16, 2014 at 10:22 am

just finished reading An Abundance of Katherines and i love it i loved it! i love all the books written by John Green! Before i never really read books because i couldn’t find a book that’s my type….BUT NOW I HAVE and i cannot stop reading at all!… Ive also read The Fault In Our Stars which was AMAZINGGGGGG an made me cryyyy.. (happy crying) loved his books… Thank you so much :)


annastacia waggoner February 16, 2014 at 5:25 pm

i know right!


annastacia waggoner February 16, 2014 at 5:24 pm

John Green is a genius!


Hannah Anderson February 17, 2014 at 7:36 pm

This book is extremely good !!!


daniela February 18, 2014 at 5:41 pm

Dear john,
i fell in love with this book i have to say its one of my favorite ones to be honest this book was the best thing ive ever read in my entire life i felt like i was in the book. “the abundance of katherines” makes me want to go on a road trip and feel infinite and be young and crazy! your books are definitely my type. Please write more books.

sincerely Daniela :)


Luan Kelwyny February 19, 2014 at 11:53 pm

Dear John Green,
I come for this to tell you that i love the book: An Abundance of Katherines.
Seriously, this book changed my life. All the anagrams are perfect, everything was perfect, dot to dot.
Amazing, amazing, amazing.
your book is AMAZING.
I’ve just wanna say thank you.

By your number one fan, Luan Kelwyny.


alecs February 21, 2014 at 10:58 pm

i completely loved it very well written and one of the best book i’ve read


Anna Tischer February 26, 2014 at 8:57 pm

Dear Mr.Green,
I love your books so much. I have to say that my favorite book so far is “Looking for Alaska” even though I probably should not be saying this since I have not read “Will Grayson” or “The Fault in our Stars. I appreciate your books so much and my favorite book in the whole world is “Looking for Alaska”, and their are a lot of books on the planet. I am leaving you a message, so I can kindly to ask you to write more books. They are an inspiration to read, and for school I have to read a required amount of books and all I read basically are your books so I am not sure how I will reach the minimum. You probably read a lot of these fan letters and I will say I am most likely like every other, but I hope you will email me back. I am in 7th grade at Inman Middle School in Atlanta, Georgia, and many of my classmates love your books too. I was not able to finish my home work for school for a couple days because I could not put down “Looking for Alaska”! I strongly think that a movie should be produced off of your book. The writing in your books are not just words, they are stories and beautiful memories put into a book. I can not describe how you link your words to story so well. An example is when you wrote that Alaska said “you smoke to enjoy it, I smoke to die”. Most of my friends say “The Fault in Our Stars” is also an amazing book and I am on page one and am looking forward to being hooked and finishing. I also really enjoyed your part in the book “Let it Snow”. That was also a book that really hooked me. One of the girl’s at my school has you email and you responded to her so I will also send this to your email in case you don’t get this. I love your books so much and I have already said this a million times but oh well. For all of my spare time I read your books. Your books definitely changed my perspective in life. Hope you wright more books!
Anna Tischer


Steph Branch February 27, 2014 at 11:52 am

Dear John Green,

Steph here. I’m presently working on my independent study unit for my grade 12 English class, and I have chosen you and your works to be my subject. I now have to write a biography and a socio-historical text along with an essay about you and your novels. I’m a huge fan of your work. While doing my research, I’ve learnt a lot about you and what has inspired you to write, but I haven’t been able to find out a few of the following things:

1. What made you want to start writing? What or who made you want to be an author?
2. Were you and your brother always close?
3. How did your time serving as a student chaplain at a children’s hospital change your life?
4. Did you enjoy high school?
5. Were any of your novels (besides The Fault In Our Stars) based on any personal experiences?

Thank you so much for your time,
-Sincerely, Stephanie Branch


Gail Anne P. Mallari March 9, 2014 at 9:41 pm

Hello, I’m a fan here in the Philippines. I just want to ask if what literary theory you used in your novel AN ABUNDANCE OF KATHERINES? I picked your novel for one of my requirement in one of my majors (Anglo-American Literature) in school. I’m going to analyze your novel please respond. It will be a great help for me. thank you very much. God bless!


chloe March 15, 2014 at 9:05 pm

This was the first book I read of yours and made me fall in love with your books. Its awesome how your main character was actually a prodigy, which was interesting because up to that time I had read zero books where the main character’s brilliant. And of course its hilarity seriously made me break out laughing in class. The worst part was it was during a test. Quick question, Where did you get the idea for the main character in this book? The character is a little different than what you usually write about


Girl Who Loves Chinitos March 16, 2014 at 3:50 am

I do have a type (look above). And while there are more than 19 of them, I can say I was drawn to them the same way Colin was drawn to those girls. I hope to find NC-1 someday. I’m not giving up. And I haven’t made a theorem yet that explains why I love Chinese slash Korean slash Japanese looking guys. Maybe C XIX can help me. He is after all, a Math whiz.


Iohanna March 17, 2014 at 6:06 am

Dear John,

I don’t want to sound like that movie with “Dear John”…
So… I am writing on this blog hoping for you to read my comment, I really like your books and I really want to read some more… Please write and don’t stop. In my opinion you are better than Austen… I’m not kidding..

Write me… if you have time


Katherine March 17, 2014 at 9:04 am

Dear John,
First I want to say I am a huge fan of vlog brothers and all your books( My favorite is Fault in our stars ) I just finished the abundance of Katherines and loved it ( My name is actually Katherine).How did you come up with the name Katherine. I know Hanks wife name is Katherine.


Reply March 17, 2014 at 6:50 pm

If only people could understand how dangerous gas burning appliances can
be. An annual gas safety inspection could save lives.


Moi March 17, 2014 at 9:36 pm


Seeing as I have read TFIOS, LFA, and Paper Towns this was a surprise considering John didn’t make the main character’s love interest die or runaway. Congrats *slow claps* DFTBA


Emily Lane March 23, 2014 at 10:29 am

I LOVE this book! What was your purpose for writing it though?


Emily March 23, 2014 at 10:30 am

I LOVE this book! What was your purpose for writing it though?


Gaile March 24, 2014 at 10:11 pm

Hi John!!!! I would just like to ask why you chose the word ‘prodigy’ to describe Colin Singleton? I mean why not genius, boy wonder or master mind?


Daniel March 26, 2014 at 3:39 pm

This A Crazy Book


Drew P. M. Slater March 28, 2014 at 2:41 pm

John John John. First off , great books. My girlfriend got me into them and now i’m doing a report on you. Weird? Probably , but I could use some help; trying to tie in why you wrote this book is very difficult. The interwebs have let me down. Can you help? I’d appreciate it, from one writer to a literary god. – D.S


Rachael March 28, 2014 at 4:40 pm

Hi Mr. Green,

I’m sure you’ll never see this, but that’s okay. I just really want you to know that you have changed my life. I love Abundance of Katherines-and I’m on the waiting list to read Looking for Alaska and The Fault in Our Stars. I love your books. I want to read all of them so bad!

I love your footnotes. I think it’s such a cute idea. And many are humorous and full of information I didn’t know. I read all of them-even the math related ones (although I don’t really care for math, thank you Geometry). Anyway.

Please keep being amazing. Because you are the most amazing person ever, your stories are only going to be doubly as awesome. So yeah. Thanks! (:

Have a great day!!!!!



Susan Oswald March 29, 2014 at 3:12 am

Dear Mr Green

I am enjoying the story, but I’m getting irritated by the graphs. Nice idea, but they don’t make sense. Did you run them past a maths person at any point?



Susan Oswald March 29, 2014 at 3:36 am

Dear Mr Green

Huge apologies. I found the appendix. I still don’t think they make sense, but you did run them past a maths person! Just me, then.



Lama Dakik April 1, 2014 at 10:06 am

While reading “An Abundance of Katherines”, although I haven’t finished it yet so if by some miracle you do reply: Do Not Spoil It For Me!!, I have noticed that you have misused the Arabic language , where Hassan and Colin talk in what is considered “formal book language” which is only present on paper and never used while talking, especially in Lebanon. If you happen to be bored or at home on a saturday night, the pages are 64-65 for reference. You probably do not give the slightest care, however it is, supposedly, “my utmost responsibility to quote unquote protect my language”.
Thank you- Dakik


Hannah W April 3, 2014 at 8:56 am

Hi John! Early last school year, I read TFIOS. This led me to start watching Vlogbrothers, and, over the course of the year, read your other books. I know there is little chance you will ever see this, but I really just want to say thank you to both you and Hank. You guys made me realize that if I wanted to help decrease World Suck, I first needed to make sure that I was in a good place, because helping people might make them happy, but I was still miserable. You helped me to be selfish in a good way, to take a step back from everything to ask myself if I was okay, and if what I was doing was really helping me and making me happy. I realized that nearly everything in my life, especially at school, made me deeply unhappy. The people I surrounded myself with made me feel terrible about myself and the things I loved and did. I wouldn’t talk about things I liked, I wouldn’t voice my opinions or wear clothes that I liked, and I never let myself acknowledge how miserable I was. But you and Hank helped me understand that I needed to surround myself with people who made me happy, so I cut out people who made me feel bad, and ended up not having anyone at school. I was alone for awhile, and the only source of happiness was watching Vlogbrothers. But then, I found happiness in two incredibly nerdy things: theatre and Latin Club. I found my love for (and, oddly enough, talent of) acting. But more importantly, these activities led me to a group of older kids who were so happy and so unapolageticly themselves. They became my friends, and they helped me to be myself and to be happier. However, later in the year, I developed an undiagnosed eating disorder (I never went to a doctor since my parents never realized what was happening). I probably dropped about 15-20 lbs in a little over a month. The only people who ever noticed were the older kids in theatre and Latin club. They helped me to get out of the bad place I was in, but I also realized that if I really wanted to be better, I couldn’t stay at a school where the only times I was happy were during rehearsals, the once-a-week Latin Club meetings, and while reading and watching Vlogbrothers. So I audtioned for the drama department at the Cincinnati School for the Creative and Performing Arts. I go to school there now, and I’m always surrounded by people who make me happy and genuinely care about me. I no longer worry too much about what I wear or what I love. It’s nearing my 14th birthday now, and I can’t believe how lucky I am to have amazing friends and be able to be in a truly wonderful and accepting community as the Nerdfighters. So, John Green, I jut want to say thank you. From the bottom of my heart and soul, thank you for helping me through such a bad and difficult period of my life. I’m sure that I will encounter worse, but now I have friends who will help me, and I have you, Hank, and the Nerdfighters. I know that there is very little chance that you will see this, but knowing that there is a chance that you might makes me so happy. A year ago, I couldn’t really be happy, but the fact that I now can makes me even happier. Because of you, I am now seemingly possessed with the simple and utter joy of being able to experience happiness, and for that, John, I can never thank you enough.


Taya April 7, 2014 at 9:56 pm

One simple question: why did you choose the name Katherine… With only a K


Bella A. April 9, 2014 at 8:40 pm

Dear John Green,
I recently messaged you on Facebook hoping you’d respond. I really have something important to talk to you about. Anyway, I’m not writing this to nag you about messaging me. I am writing you this to say I loved An Abundance of Katherines. I just finished it about 5 minutes ago. The next book I will be reading will be Will Grayson, Will Grayson and then Paper Towns (because those are the only two books of your I haven’t read). I’m looking forward to the Paper Towns movie (starring Natt Wolff) and I am super duper VERY EXTREMELY EXCITED for the TFIOS movie!! I am a big fan of yours and have even written a paper on your books and you and how great you are. You are my favorite male author. I hope I can talk to you soon. Thank you for your wonderful books.

With Love,
Bella (A booknerd :) )


rai_roxy April 9, 2014 at 10:07 pm

Collin is really weird. I don’t understand why only like girls with the Katherin. But in the end, he fall in love with a Lindsey. But anyway, your books is soooooooooooooooooooo amaaaaaazing! I’ve already three of your books and it’s sooo sweet. Love you! Please write more!


rai_roxy April 11, 2014 at 11:02 pm

I missed of the words.


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Lilly April 20, 2014 at 8:44 pm

You’re not just a prodigy; you’re a genius. Your writing is by far my favorite. I really hope this book becomes a movie.


NATALI ARAÚJO April 21, 2014 at 8:08 pm

Anagramas mais anagramas. Gráficos mais Gráficos & Katherines mais Katherines <3 Amei o livro e amo John Green meu escritor favorito!! <3


Carla J.Boulos April 22, 2014 at 10:05 am

Dear John,
Um, Hi.
Last week there was a book exposition at my school. Beirut, Lebanon.
When I saw your book I did everything I could to buy it although I didn’t have enough money so I borrowed some from my friends.
And I really don’t know the right words but this book “Abundance Of Katherines” just spoke to me and not a lot of books do that. Honestly it was the kind of book you really wish it wouldn’t end . The moment I finished it Iwent to the nearest library and bought “The Fault in Our Stars”. And I truly truly loved it I’m still at the fifth chapter. I took a break for my Homeworks and then I’m going to continue it because really I like the way you write in your books and as a writer maybe as a young underground writer you inspired me. Anyway I had an idea of turning your book into a movie. I know it’s not nearly possible but it might be so I don’t know maybe if you would like me to. You know maybe you won’t be able to read this message between the 295 messages that has been posted here but I think mentally we are we are related. Remember what you said in the fault in our stars that your favorite book the AIA spoke to you?Well, that’s what your books do to me. Anyway, PHALANXIFOR! Hope you read this message.
Strangely but surely we think the same thing. Weird but true. Carla.


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