The Girl and the Black Christmas - Emma Griffin (r) FBI Mystery

When a mysterious package containing a severed hand is left at FBI agent Emma Griffin's doorstep, Emma is suddenly pulled into one of the buried mysteries of her past. Emma is looking forward to spending the holidays with the family she's built around herself.
Bellamy, Eric, Dean, and Xavier are coming to Sherwood to celebrate the season with her and Sam, and she's looking forward to spending some time relaxing and sharing traditions, old and new. Before the festivities can begin, she takes a trip to Feathered Nest to bring some closure, but before they can leave, an email brings an uncomfortable reminder that there are always more questions to be answered.
Soon she discovers there is someone wanting to ensure that there is no peace or joy for Emma this year. The reminders of a past she doesn't talk about and twisted gifts leave her in a brutal holiday rush to find the truth that was buried many years ago. Before the Bureau. Before Feathered Nest. Before this life. This holiday, no matter how far Emma runs, death, disappearances, and mysteries follow.
What should be the most wonderful time of the year may turn into a nightmare she can't escape.