Writing retreats are murder.

I just turned my new home into a cozy bed-and-breakfast, and my first guests are a group of five horror writers looking for a retreat, including the famous Jason Baskin. But everything went wrong when my family ghosts vanished. No amount of ghost hunting on the part of the writers could bring them back. Then, Jason Baskin, dropped dead just outside his room. Now, I have to team up with Sarah, my wise and witty mentor, and solve the murder before someone else dies. But how can I do that without Sebastian, my lazy but loyal familiar? And how can I protect my guests from a killer who knows my magick better than I do?