Mystery Book Discussion: The Twelve Books of Christmas by Kate Carlisle

A locked-room cozy mystery with a Christmas theme! Book-restoration expert Brooklyn and her security-expert husband, Derek, go to Scotland to attend Claire's wedding at a castle. While they're there, Claire asks Brooklyn to solve the mystery of the twelve rare books that have gone missing from the castle library. When one guest turns up poisoned, and another with an arrow through the heart, it's up to Brooklyn and Derek to find the killer and the book thief before another murder occurs and their friend's happy future turns dark and deadly.