Conquest - Ravages of Honor, #1

Genetic engineering and nanotechnology have given the donai  long lives but still condemned them to extinction. House Dobromil wants to reunite both races, human and donai, to combine only the most desirable traits of each into their House's genome. The process has been deadly to humans. Until now. Cultures and passions clash in this epic, adventurous space opera about honor, bravery, and love (that does not fade to black).  For those who enjoy deep plots, intense worldbuilding, unforgettable characters, and stories about feuding noble Houses, political intrigues, and technology advanced enough to be magic. Series reading order: Bonds of Love and Duty, a short story in Fantastic Hope, edited by Laurell K.
Hamilton and William McCaskey. Dominion: A Ravages of Honor NovellaFeatherlight: A Ravages of Honor NovellaRavages of Honor: Conquest (Book 1)Ravages of Honor: Ascension (Book 2)