Chaos mode
Piers Anthony, Romas Kukalis, G.P. Putnam's Sons (Publisher)
... One universe is stacked on another, and an unlikely band of heroes has learned how to pass from one into the next- frequently with danger at their heels. Colene, a young woman from Earth, has learned to fight back against the suicidal depressions that torment her. Darius, the king from another planet who won her love, finds that his feelings are ever deeper for this lonely human. And Seqiro, the telepathic horse who share their journeys, knows that his instinctive desire to travel through multiple universes with Colene was the best choice he could have made... -- front flap
Print Book, English, 1993
G. P. Putnam's Sons, New York, 1993