Split infinity

About “Split infinity”

On the technological, decadent world of Proton, someone is trying to destroy Stile, serf and master Gamesmen. His only escape lies through a mysterious curtain revealed by a loving robot, leading to Phaze, a world ruled by magic, where he realizes an alternate self has already been killed and he is due to be the next victim. His fate on Proton depends on winning the great games; on Phaze, he can survive only by mastering magic. A 1980 novel by Piers Anthony.