Happy are the Poor in Spirit by ANDREW M. GREELEY

A stunning novel of suspicion and sin from a bestselling author. Someone is trying to kill Bart Cain, a wealthy commodities broker. His family suspects the ghost of Mary Anne Haggerty, who disappeared in 1947 . . . on the night she went to the prom with Cain. And, after three brushes with death--and three chilling phone calls from a woman assumed dead--Cain's family wants an exorcism.