Darkscape Series by R. Garland Gray

Lord Lachlan de Douglas, heir to a Clan of Ancient Earth, constantly defends his people from annihilation. When a sudden horror alters his being, he is condemned to a world of private anguish and torment. Lt. Kimberly Kinsale, a diplomat's daughter, serves in an elite combat group aboard a war ship. In a moment of lunacy and folly, she is forced to decide between remaining loyal or betraying her clan for a Douglas enemy lord... moreLord Lachlan de Douglas, heir to a Clan of Ancient Earth, constantly defends his people from annihilation. When a sudden horror alters his being, he is condemned to a world of private anguish and torment. Lt. Kimberly Kinsale, a diplomat's daughter, serves in an elite combat group aboard a war ship. In a moment of lunacy and folly, she is forced to decide between remaining loyal or betraying her clan for a Douglas enemy lord. Fighting the sinister legacy of the matrix robots, Kimberly must now trust her enemy with her life, her heart, and her very soul. But as time slowly runs out, she realizes even an exquisite love may not be enough for salvation. less

In this science fiction romance that blends clan alliances, historical heritage, and a feudal government, Declan de Douglas has come to Planet Forest to negotiate a trade agreement with the treacherous Clan MacKendrick. Despite his training on Planet Mars under the Braemer Keep of Clan Douglas, Declan is not prepared for the peril ahead and ends up in the collared life of slavery... moreIn this science fiction romance that blends clan alliances, historical heritage, and a feudal government, Declan de Douglas has come to Planet Forest to negotiate a trade agreement with the treacherous Clan MacKendrick. Despite his training on Planet Mars under the Braemer Keep of Clan Douglas, Declan is not prepared for the peril ahead and ends up in the collared life of slavery. Fallon MacKendrick, princess of the MacKendrick clan, has fallen deeply in love with this forbidden savage despite the laws of her betrothal contract. When she later discovers that he has been kidnapped, she resolves to rescue the haunted man who touched her heart. But the destined lovers are doomed unless Declan’s soul can accept the DNA synthesis that has altered his physical makeup. Princess Fallon holds his life in her hands—the only woman with the power to save him from his captors and himself. less