Nightwalker by Heather Graham

Jessy Sparhawk works in Las Vegas. Not inclined to gamble she decides to try her luck and ends up with a dead man pinning her to the craps table. Dillon Wolf, hired by casino executive Emil Landon, is drawn to Jessy and feels there might be a connection between Jessy's dead man and Landon's stalker. An adventure into the unknown, ghosts seen by those called "nightwalkers", a puzzle for Dillon to solve with his sidekick, ghost Ringo Murphy. Light entertainment for the casual reader. Not a bad read. Sandy Penton