Slave Island by Anonymous

He created a secret civilization where females served as love slaves. Strange radio signals and a magnetic force lure the good ship Anastasia to an uncharted island in the pacific. But the passengers soon learn this is not ordinary speck of land. Amidst the swaying palm trees and jungle growth, Lord Henry Philbrock, a sadistic genius, has built a hidden paradise where captive females are forced into slavery, and trained to accommodate the most bizarre sexual cravings of the rich, the famous the spoiled, the pampered.