Bad Boy M.D. by Virna DePaul

It was only meant to be a dating app hookup. Turns out HeartBreaker531 isn’t an anonymous medical student after all—he’s my new chief resident…

As one of the top cardiac surgeons in the United States, Dr. Lauren Decker is fearless in the operating room, but her personal life is a different story. After her surgeon ex-husband cheated on her with a nurse half his age, Lauren has sworn off men—doctors, specifically. Never again.

But one day, the sexy and infuriatingly cocky Ryan Castle arrives. Looking to be the newest resident on staff, he challenges Lauren’s resolve to protect her heart. He’s gorgeous, ten years younger, a smartass at the top of his game, and soon, Lauren finds herself fighting fantasies of late-night trysts in the cardiology wing.

Like Lauren, Ryan’s been burned by love, but what starts out as an irresistible challenge to get Lauren into bed soon turns into more. She’s fighting what she feels by giving him the cold shoulder, and there’s only one thing to do.

Turn up the heat in the ER.