Autumn moon - Jan DeLima

The author of Summer Moon returns to her "great werewolf world,"* where war looms and love may be the key to saving all of shifter kind.

For centuries, Cormack has lived between worlds-a man trapped in the body of a wolf, shunned by humans and shifters alike. Only one person has ever welcomed his company: Elen, a kindred outcast who is feared by others of her ancient Celtic race for her strange healing abilities. Cormack has always valued Elen's kindness and understanding, but after a desperate act of friendship causes Elen to free him from his curse, he realizes he wants more. He wants all of her-completely and forever.

Except before Cormack can win Elen's heart, Pendaran, the evil leader of the Guardians, captures her, determined to manipulate her incredible power to aid him in his twisted war against the shapeshifting tribes. Now Cormack must use all of his skills as a warrior and a wolf to save the woman he loves-before Pendaran's vile schemes destroy them all.

*USAToday.com