Colin Singleton is an extremely smart 17-year-old who has just been dumped by Katherine. In fact, he has been dumped by 19 Katherines — the only girls he has ever dated are all named that. His best friend Hassan takes him on a road trip to help him get over Katherine. On this road trip he meets new people and ends up detoured in a small town called Gunshot. There they find summer work, and Colin tries to create a formula, which he dubs The Theorem of Underlying Katherine Probability, to predict how long his relationships will last.
The book is enjoyable, especially for those who love math and would enjoy reading Colin’s thoughts as he attempts to graph and calculate the world around him.
Rated: High for language. There is a lot of swearing throughout the book. The f-word is only used once, but Colin and Hassan use euphemisms for it frequently. There also is a brief sex scene when Hassan and Colin walk in on Hassan’s new girlfriend cheating.