Crossfire — Gale Stanley

Casey is visiting a rival pack. His orders are clear. Kill their Alpha and take control. Falling for Alex is not part of the plan, but Casey can't deny the attraction between them. Alex comes with a lot of baggage. Years ago when he lost his mate, he erected an impenetrable wall of stone around his heart. He always believed he'd be alone the rest of his life, but something about his visitor intrigues him, and he opens his heart to Casey. As Casey's desire for Alex grows, he knows there's no way he can go through with his mission, and he puts it off. But his Alpha is getting impatient, and finally Greyson shows up threatening to take matters into his own hands. Can Casey save the man he loves?