Nightwork by Irwin Shaw

Pilot Douglas Grimes’s best days are long behind him. Grounded due to a medical condition, Douglas has resigned himself to menial work as a desk clerk at a seedy hotel. But his fortune flips when he discovers a hotel guest dead from a heart attack and, next to him, a tube jammed with hundred-dollar bills. Douglas grabs the money and, with it, the chance to remake his life. In Europe, he meets Miles Fabian, an elegant and erudite con man with a flair for extravagance. Fabian recruits him for his latest ploy: robbing members of the idle rich. But what will happen when his bad behavior catches up with him?