(From the publisher):
Unable to escape his recurring visions of a fantasy realm called Midland, psychologist Richard Brandon has begun doing research into past life regression by experimenting on himself. What he doesn't realize is that his tests are opening gateways between alternate worlds in which he leads quite different lives--and one thing that all the different Richards have in common is their dreams of this magical place.
Original title: God's Dice
Genre: Fiction→ Science Fiction→ World Versions→ Alternate and Parallel Worlds