Quest Crosstime: Andre NortonBook II of Blake Walker: The universe had opened up for Blake Walker when he discovered that his world our own Earth was just one of hundreds ranked side by side on alternate timelines, each more strange and wondrous than the other, all coexisting at once, and all available to Blake Walker and the few natives of those other Earths who could break the barriers between timelines. But Blake's new existence is threatened now his time traveling patron's