A flash of lightning, quivering ground, and, instead of her grandparents' farm, Polly sees mist and jagged mountains -- and coming toward her, a group of young men carrying spears.Why has a time gate opened and dropped Polly into a wo...

A touch of computer keys, a blast of heat, and suddenly the Murry twins, Sandy and Dennys, are gasping in a shimmering desert land.  If only the brothers had normal parents, not a scientist mother and a father who experiments with s...