Who Killed the Ghost in the Library — Teresa Watson

Cam Shaw is an out-of-work ghost writer who places an ad in the newspaper looking for a new client. When she gets a reply and meets the client, she gets more than she bargained for. She's thrown into a 60-year-old mystery, but somebody doesn't want the truth to come out, and they are willing to go to any lengths to keep that from happening...even if it means killing Cam.