Prizzi's Glory — Richard Condon

A crime family goes legit -- sort of -- and enters politics, in this “razor-sharp satire on the American dream” (Publishers Weekly).

If Charley Partanna is lucky, he can go a few months without falling in love. During these stretches, he's able to focus on his job as chief executioner for the Prizzi family. But once romance strikes, Partanna -- a criminal manager who still commits the odd murder for old time's sake -- is lost to the world. So he knows there will be trouble when he meets his latest infatuation at an orgy. She's clothed from neck to ankles, but she's the sexiest woman Partanna has ever seen, and she hits his heart hard.
 
His latest affair may be consuming Partanna body and soul, but he'll have to make sure it doesn't interfere with the Prizzi family's latest venture: politics. And with the Prizzis' sights set on the White House, Partanna will discover the campaign trail is a bloody one indeed.
 
Prizzi's Glory is the 3rd book in the Prizzi series, but you may enjoy reading the series in any order.