Strange Tides — A.J. Matthews

Journalist Lynne LaRoche gets mixed up in a bar fight and plunges into an age-old mystery. She helps sexy islander, Sinful Patrice, and sexy black aviatrix, Jessie Willard, evade a trio of hoodlums, and they embrace her in a ménage-a-troi, as a way to thank her.

Together they set out on an adventure to seek Patrice's inheritance on a volcanic island. They run across a corrupt gendarme and an evil priest who conspire to take over the world. Only Lynne, with the help of Patrice and Jessie, can stop them.