An Abundance of Katherines — John Green

When it comes to relationships, Colin Singleton's type happens to be girls named Katherine. And when it comes to girls named Katherine, Colin is always getting dumped. Nineteen times, to be exact. He's also a washedup child prodigy with ten thousand dollars in his pocket, a passion for anagrams, and an overweight, Judge Judy-obsessed best friend. Colin's on a mission to prove The Theorem of Underlying Katherine Predictability, which will predict the future of all relationships, transform him from a fading prodigy into a true genius, and finally win him the girl.

Letting expectations go and allowing love in are at the heart of Colin's hilarious quest to find his missing piece and avenge dumpees everywhere.