The Invisible Ring — Anne Bishop

In a world where magic is power and social status is everything, the color of the jewel you wear determines the course of your life...

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.

Purchased by a notorious queen, Jared fears he will share the mysterious fate of her other slaves--never to he seen again--and so prepares himself for death. But the Gray Lady may not be what she seems and Jared soon faces a difficult decision: his freedom, or his honor....