Spellbound Captive by Tamara Hughes

She’s enchanted by a beast. He’s enchanted by her.

Freed from possession, Kade Rennick is obsessed with ridding the world of dragon spirits—especially the one that infected him with its spawn. But first he must get past the beautiful yet confused witch who is protecting the beast.
Enthralled by the monster that has control of her childhood friend, Faith Edwards doesn’t always understand why she makes the choices she does, but one thing is for certain. She will stop at nothing to save her friend and free herself from the nightmare she’s been living in for the last twelve years.
Despite Kade’s insistence that her mission is a lost cause, their attraction for each other intensifies. When Faith crafts a powerful spell that will open a portal to the dragon spirit realm, Kade must stop her, no matter what it takes. Humanity hangs in the balance.