Dave Eggers is a terrifically talented writer; don't hold his cleverness against him. What to make of a book called A Heartbreaking Work of Staggering Genius: Based on a True Story? For starters, there's a good bit of staggering genius before you even get to the true story, including a preface, a list of "Rules and Suggestions for Enjoyment of This Book," and a 20-page acknowledgements section complete with special mail-in offer, flow chart of the book's themes, and a lovely pen-and-ink drawing of a stapler (helpfully labeled "Here is a drawing of a stapler:"). But on to the true story. At the age of 22, Eggers became both an orphan and a "single mother" when his parents died within five months of one another of unrelated cancers. In the ensuing sibling division of labor, Dave is appointed unofficial guardian of his 8-year-old brother, Christopher. The two live together in semi-squalor, decaying food and sports equipment scattered about, while Eggers worries obsessively about child-welfare authorities, molesting babysitters, and his own health. His child-rearing strategy swings between making his brother's upbringing manically fun and performing bizarre developmental experiments on him. (Case in point: his idea of suitable bedtime reading is John Hersey's Hiroshima.) The book is also, perhaps less successfully, about being young and hip and out to conquer the world (in an ironic, media-savvy, Gen-X way, naturally). In the early '90s, Eggers was one