Unholy Quest — John Enright

Thor Johnson makes a profession of fighting in other people's wars. So his new assignment, training guard dogs on a Caribbean island, sounds downright relaxing. But it's not relaxing for long. The island is in the grip of a religious cult that aims to sweep the world. The cults's prophet upholds a very old-fashioned family ideal: one husband, many wives. But instead of being one big happy family, the cult is a web of jealous intrigue which soon entangles Thor. Even more entangling is a mysterious dancer. She follows Thor to the island, and soon men are fighting over who will possess her. Thor must go to war once again, battling for his life, and struggling to understand what is happening to his own soul.