Stone's in big trouble when he rsvps a plus one for his sister's wedding and Cassandra is the only one he can bring.

Cassandra Cillian loves Christmas but Jacob Stone isn't feeling it this year after a disastrous Thanksgiving. So Cassandra, determined to bring joy back to her friend, makes him a deal, join her on her Christmas adventure to do a new activity every day. A chapter a day until Christmas.

A collection of one shots about the relationship between Cassandra Cillian and Jacob Stone on The Librarians