The Ghost and the Dead Man's Library: Penguin Publishing Group

Bookshop owner Penelope Thornton-McClure has just received an extremely rare collection of Edgar Allan Poe’s complete works. Rumor has it a secret code, trapped within the books’ leather-bound pages, leads to buried treasure. Well, it looks like they got the buried part right, because as Pen sells off the valuable volumes, everyone who buys…dies.
Once these books go missing from their owners’ cold hands, Pen will need resident ghost and hard-boiled PI Jack Shepard to help crack the case. The police are skeptical that the deaths involved foul play—so it’s up to Pen and Jack to unravel these shocking endings…