Bloodfire — John Lutz

At first Fred Carver agrees to help distraught Bob Ghostly find his missing, heroin-addicted wife, Elizabeth. But all it takes is a corpse, a narrowly dodged bullet, and the discovery that his client is Florida's most notorious drug dealer for the crippled P.I. to call it quits. But when Elizabeth turns up, seeking refuge from her crazed, hot-blooded hubby, Carver is trapped in a twisted tangle of narcotics, lies, and revenge that is too hot to handle...and too deadly to survive.