Colin Singleton, a 17 year old ‘former’ child prodigy decides to go on a road trip with his best friend Hassan. Colin, who might remind you of Sheldon Cooper from Big Bang Theory, is very particular about what and whom he likes. He only has girlfriends named Katherine even though Katherine XVIIII just dumped him. Colin decides to create a formula – the Theorem of Underlying Katherine Predictability – that will forecast the fate of romantic relationships. If he can accomplish his goal, not only will Katherines never dump him again, but Colin will prove his genius. Their road trip lands them in Gutshot, Tennessee where they meet Lindsey and her mom, Hollis. Colin, Hassan, and Lindsey have more in common than the reader may first realize. All three are looking for a ‘missing piece’ that will aid them in redefining who they are. If you like John Green’s quirky characters and humor, you will enjoy Abundance of Katherines.