The Ghost and the Dead Deb — Alice Kimberly

This was the only rule bookshop owner and widow Penelope Thornton-McClure had given her resident ghost, hard-boiled PI Jack Shepard. But when the hot young author Angel Stark arrives at the store to promote her latest, a true crime novel, Jack can hardly contain himself. After all, this is his specialty!

Angel's book is an unsolved mystery about a debutante found strangled to death. And it's filled with juicy details that point a finger at a number of people in the deb's high society circle. But when the author winds up dead too -- in precisely the same way -- Pen is fast on the case ... which means Jack is too. After all, a ghost detective never rests in peace.