The Maker of Universes

1965 Ace Books mass marker paper back, Philip Jose Farmer (Riverworld: Including To Your Scattered Bodies Go & The Fabulous Riverboat). The story follows Robert Wolff, a man disenchanted with his life and his marriage. One day, while looking at a new house, Wolff discovers a strange horn in the basement. Blowing the horn, Wolff is transported to a strange new world, the World of Tiers. Wolff finds himself initially in an edenic paradise known as Okeanos. This region is the first level of the planet, which contains a number of tiers like a wedding cake, separated by vast mountain ranges. The entire planet is ruled over by a cruel and mysterious lord named Jadawin, who created it. Okeanos consists of a beach, an ocean, and a small forest and is populated by nymph like humans who originated in and near ancient Greece. In this new world, Wolff regains his youth and vigor and falls in love with a local woman named Chryseis who lived in Troy at the time of the Trojan War. - Amazon