The Christmas Castle. Holiday House, #4

In a remote, Scottish castle, love and secrets collide. After five years with her self-absorbed boyfriend, librarian Charlotte Glass surprises them both and breaks up with him. Before parting, he bitterly tells her to have fun on their upcoming romantic vacation-alone. The ancient stones of Craigthorn Castle rise from the Highland mists of coastal Scotland like something from a fairy tale. Charlotte tells herself she's here to heal, not to fall in love.
But when jet lag leads her to the castle's library at midnight, the crackle of the fire and scent of old books draw her in-along with the castle's enigmatic laird. Beside the hearth sits a strapping Scotsman with storm-gray eyes that seem to see right through her carefully built walls. Ian MacKay's charm masks deeper wounds. As the last of his line, he bears the weight of centuries of duty and a secret that threatens everything he holds dear.
One thing he can't hide is his growing fascination with Charlotte. Their time together is limited-she'll be gone in a week. But a week is long enough for Ian to know that he's falling in love-and that the truth he harbors will destroy any chance of a future together.