A New York Times Book Review Editors' Choice Rory Hendrix, the least likely of Girl Scouts, hasn't got a troop or a badge to call her own. But she still borrows the Handbook from the elementary school library to pore over its advice, looking for tips to get off the Calle--the Reno trailer park where she lives with her mother, Jo, the sweet-faced, hard-luck bartender at the Truck Stop. Rory's been told she is one of the "third-generation bastards surely...