This is a story about recent high school graduate Colin Singleton. A former child prodigy, Colin is now merely another smart teenager with underdeveloped social skills and a yearning to leave his intellectual mark on the world. With the summer between high school and college to kill, he's also heartbroken because his girlfriend, Katherine, just dumped him. Actually, she's the nineteenth Katherine to sever relations with Colin (hence the title) -- although one of the book's enduring mysteries is how someone as neurotic as Colin manages to have relations with 3, let alone 19 girls, whatever they may be named. In any event, Colin is fortunate to possess a roly-poly sidekick/best buddy named Hassan, who promptly prescribes a road trip as the cure for...