"For fans of Mr. Penumbra's 24-Hour Bookstore, an arresting literary puzzle that introduces an unforgettable young heroine plunged into the twisted world of a secret society occupying the derelict buildings of Philadelphia, which heralds the arrival of an astoundingly imaginative and propulsive new voice in fiction. Lee Cuddy is 17 years old and on the run, alone on the streets of Philadelphia. After taking the fall for a rich friend, Lee reluctantly accepts refuge in the Crystal Castle--a cooperative of homeless kids squatting in an austere, derelict building. But homeless kids are disappearing from the streets of Philadelphia in suspicious numbers, and Lee quickly discovers that the secret society's charitable facade is too good to be true. She finds an unexpected ally in Tomi, a young artist and hacker whose knowledge of the Internet's black market is rivaled only by his ability to break into and out of buildings. From abandoned aquariums to highly patrolled museums to the homes of vacationing Philadelphians, Tomi and Lee can always chart a way to the next, perfect hide-out"--