Romenel - Obligations of Blood — Sandra C. Stixrude

Ancient voices reveal a terrible secret: human scientists created the kresnas, devourers of life and sanity. Not only created, but also used in terrible, torturous experiments, turning them against their creators.

Romenel's dilemmas pile up until he's lost in them. How can he destroy all the hordes of kresnas at once and is it morally defensible to do so? What other solution is there if humans are to survive? What should he do about the beautiful warrior, Kyliki, since he has no place in her world and she has none in his?

And, hang it all, if he can resolve these things, what in blazes is he going to do about the mess of a succession war raging back home?