"Like many young people, Heidi Julavits kept a diary. Decades later she found her old diaries in a storage bin, and hoped to discover the early evidence of the person (and writer) she'd since become. Instead, 'The actual diaries revealed me to possess the mind of a paranoid tax auditor.' The entries are daily chronicles of anxieties about grades, looks, boys, and popularity. After reading the confessions of her past self, writes Julavits, 'I want...