Darkling: Possession (Darkling #3)

Diana has known for many years she's meant to be mate to a Darkling, but she refused to answer the summons. With the disappearance of her best friend, she now feels she has no choice. Once she makes the commitment, she wasn't sure what to expect, but the combination of rage and horrible grief wasn't it. Now, she has to deal with her fear and his anger. He's a broken soul on the verge of betraying the God who made him a protector of men and only Diana's unconditional love can save him.