A Christmas candy killing

Identical twin sisters Alex and Hanna are the owners of the Murder and Mayhem bookshop that sells their famous poison-themed Killer Chocolates. As Alex is preparing for Christmas, her elderly friend Jane tells her that a real murderer from a true-crime show is in town. Then Alex arrives at Jane's house and discovers her dead body near a box of Killer Chocolates. Now Alex is a suspect because she is a beneficiary in Jane's will. Alex sets out to find the real killer and prove her innocence. Includes recipes.