Serpent's Kiss The Dragonfire Novels Series, Book 13.

One spark can banish every shadow in his heart. The dragon shape shifter Thorolf is known for an impressive lineage, raw power in battle, and the impulsive indulgence of his appetites. The last has made him an outcast from his fellow Pyr, and even his hunt for their dangerous opponent, the Slayer Chen, hasn't helped. Seduced by Chen's ally Viv Jason, Thorolf finds himself drawn into a trap, as bait to lure his fellow Pyr to extinction. The only o...