A King's Ransom - Masters of Pleasure, #1

On a quest to find his brother, King Kritan of Katarian on the planet of Panucia finds himself ambushed and then forced to fight in the arena games. Nothing can change his hatred for everything Tamonius--his rival kingdom--that is until he meets the most breathtakingly beautiful woman he's ever laid eyes upon. Surina of the House of Argyros, daughter to a powerful senator, stirs the beast within him, making it want to lay claim to her as badly as the man does.