Books like The Invisible Ring

A prequel set in the "dark and sensual world" (11th Hour) of the national bestselling Black Jewels Trilogy.Jared is a Red-Jeweled Warlord bound as a pleasure slave by the Ring of Obedience. After suffering nine years of torment as a slave, he murdered his owner and escaped -- only to be caught and sold into slavery once again. The notorious queen who has purchased him, known as the Gray Lady, may not be what she seems. Soon, Jared faces a difficult choice: his freedom, or his honor.