David and Molly Jones live with their three-year-old son on Manhattan's Upper West Side. They are devoted to their child and secure in their love for each other. "Then Deirdre invades their lives..."

Once upon a time, she was David's wife. Now, suddenly, she is their new neighbor...befriending their son...luring her ex-husband back into a world of addictive sex David both craves and fears. But Deirdre won't be content to be the other woman forever. She wants David back--this time for keeps. There's only one force Deidre didn't reckon on: David' wife. To hold on to her family, her sanity, and her life, Molly is willing to go to hell and back.

Played out against a teeming backdrop of urban life--with all its hidden perils and sudden, random violence-- "The Ex" grabs you by the throat and doesn't let go until the explosive climax. With this novel, John Lutz proves once again that he is the master of spine-tingling, edge-of-your-chair suspense.