The Ghost and Mrs. McClure (Haunted Bookshop Mystery)

Penelope Thornton-McClure manages a Rhode Island bookshop rumored to be haunted. When a bestselling author drops dead signing books, the first clue of foul play comes from the store's full-time ghost-a PI murdered on the very spot more than fifty years ago.

Is he a figment of Pen's overactive imagination? Or is the likable, fedora-wearing specter the only hope Pen has to solve the crime?