An Abundance of Katherines, by John Green
John Green’s Printz Honor-winning novel introduces the reader to Colin, a former child prodigy who’s pretty sure that he doesn’t have the brainpower to become an adult genius. After a painful break-up at the end of his senior year, he doesn’t really know what to do with himself, so his best friend drags him on a road trip that finds them new crushes. This book perfectly captures the identity crisis of a recent high school grad who is realizing that what defined them as kids might not define them as adults. It also features some hilarious footnotes ranging from Greek translations to German slang.