Devil May Cry Dark-Hunter Series, Book 11.

As an ancient Sumerian god, Sin was one of the most powerful among his pantheon. . . Until the night Artemis brutally stole his godhood and left him for dead. For millennia, this ex-god turned Dark-Hunter has dreamed only of regaining his powers and seeking revenge on Artemis. If only life were that simple. Unfortunately he has bigger fish-or in Sin's case-demons, to fry. The lethal gallu that were buried by his pantheon are now stirring and the...