Roland Smith, the master of middle-grade adventure, returns with a new novel full of high-speed chases, secret identities, and a dangerous underground world.What waits Beneath?Pat O'Toole has always idolized his older brother, Coop. He's even helped Coop with some of his crazier plans -- such as risking his life to help his big brother dig a tunnel underneath their neighborhood in the suburbs of Washington, DC. Coop is . . . different. He doesn't...