Forever Werewolf by Michele Hauf
He was searching for a home. He didn't expect to find her. Trystan Hawkes is looking for family, for his true werewolf pack, when he is trapped at Castle Wulfsiege following an avalanche. Stuck in her lair, he's soon drawn to werewolf princess Lexi Connor but her cool attitude makes winning her heart a challenge...And Lexi is hiding a secret from Tryst - the dark truth that could forever impact their future together. Now Tryst has to decide how much he's willing to give up if he wants to win Lexi's heart.