Jill Knowles - Concubine MM

Scholar, captain...war prize. Prince Kael of Korai is stunned when his father gives him to an enemy warlord in a desperate attempt to salvage Korai's reputation. With his country's honor at stake, Kael resolves to submit to Warlord Taren's every debauched whim.

But life in Zandria isn't anything like what Kael imagined. Instead of pain and cruelty, Warlord Taren seduces Kael until the bewildered prince craves his Master's every intimate caress. As he sinks into the decadent, sensual life of a concubine, Kael makes a powerful enemy, one who wants him removed from Zandria by any means necessary. Betrayed by his body, trapped by his honor, Kael must learn to trust his Master or get them both killed.

as requested