cover image The Walls of the Universe

The Walls of the Universe

Paul Melko. Tor, $25.95 (383pp) ISBN 978-0-7653-1997-5

Melko (Singularity's Ring ) sends a naïve high school senior on a sharply imagined trip across divergent time lines in an adventure with both brains and heart. John Rayburn is approached by John Prime, another universe's version of himself, who lends him a device that permits travel to parallel worlds. John realizes he's been tricked when he can't get back home. He stops in an almost-familiar universe to analyze the device and return to his own world, where John Prime is trying to get rich quick by “inventing” gadgets that his new home lacks. Soon the two are making friends and putting down roots, each discovering that he carries his own fundamentally empathetic, responsible personality from one universe to another. With imagination and sympathy, Melko makes the journey genuinely exciting and leaves plenty of room for future exploits. (Feb.)