An Abundance of Katherines
Colin Singleton - a child prodigy who is obsessed by anagrams and the idea of being a genius - has dated nineteen girls named Katherine. He has also been dumped by nineteen girls named Katherine. After Katherine the Nineteenth breaks up with him, Colin's best and only friend Hassan convinces him to go on a road trip in the hopes of taking Colin's mind off the failed relationship.
A large amount of driving leads the two to Gutshot, Tennessee, the apparent resting place of Archduke Franz Ferdinand and hometown of Lindsey Wells - whose boyfriend is also called Colin. While taking the tour of the Duke's tomb, Colin has an Eureka moment; he will prove The Theorem of Underlying Katherine Predictability, a theory which he hopes will be able to predict the length of any romantic relationship.
While Colin is working on his theorem, he and Hassan stay with Lindsey and her mother Hollis in their big pink house. The two boys also do jobs for Hollis, who owns the town’s tampon string factory.
An Abundance of Katherines is John Green's second novel and is a 2007 Michael Printz Honor ook. Some of the more complex math was written by Daniel Biss, Nerdfighteria's resident mathematician.