Why We Broke Up by Daniel Handler; illus. by Maira Kalman High School    Little, Brown    355 pp. 12/11    978-0-316-12725-7    $19.99 Min and Ed’s differences are profound–most obviously, she’s a quirky aspiring filmmaker and he’s a popular jock. Readers see immediately, though, that it’s not simply these practical differences that caused their breakup, the event on [...]