Colin has been dumped. A lot. Nineteen times, in fact, all by girls named Katherine. Colin's a smart guy, though, and he's sure there's a reason. A reason that can be expressed mathematically. His best friend, concerned for Colin's mental health, takes him on a road trip to distract him from the heartbreak--but can Colin stop working on his Theorem long enough to appreciate love, friendship, and a statue of a dead archduke? 
 Brings together teen break-up quasi-comedy with math, and is a really fun, quick read. Less math-y than I'd expected from the cover. Not sure I buy the premise, but since when has that stopped me from enjoying a good story with smart, entertaining characters?