I really enjoyed this book and realized it is the fourth road trip book I have read in about two years. The story revolves around Colin Singleton who has just been dumped by the nineteenth Katherine he has ever dated. He is really hurt by this, so he and his friend Hassan convince Colin's parents that it would be best if they went on a road trip and "find" themselves which really means get Colin over Katherine. They end up in Gutshot, Tennessee (they originated in Chicago), living with a girl named Lindsey (who is dating a guy named Colin, nicknamed "TOC" [the other Colin]) and her mom Hollis while they take down a history of the town given by the residents. The original Colin is trying to figure out why his relationships with Katherines always end and why he is the one who always gets dumped. He is on a mission to create a mathematical formula that predicts relationships, except there is hitch after hitch on why it does not work. Does Colin ever figure out the formula and get over Katherine XIX?