Good Condition. Paperback. Pseudonym of Sherilyn Kenyon. Book 2 of 3 in the Lords of Avalon Series
Knight of Darkness
For countless centuries, I've been the assassin for the infamous Merlin, even though the woman who birthed me sits at the right hand of our enemy, Morgen le Fey. Now both my mother and Morgen have decided that it's time I take my place on their side of this conflict.
Normally, telling them no wouldn't be a problem, except for the fact that the good guys I protect think that I'm an even worse demon than the ones we fight. Hmm, maybe they're right. I have to say that I do enjoy maiming anyone who gets in my way.