Diavolo by T.A. Fan

There will be hell to pay when an angel saves a devil’s life.

Dr. Elyse Romero is used to dangerous house calls. Not long after she inherited her father’s debts to all the wrong people, she’s been the doctor on call for the mafia.
One night, a handsome stranger is brought to her apartment. Fatally wounded, he’s already fading at death’s door. But Elyse can’t let him die. Her new patient is revealed to be none other than Alessandro Vitale, a member of Cosa Nostra and the heir to his family’s dark empire.
If he dies, she dies, too.

Can the beautiful surgeon survive the night?
Or will she lose everything to the devil—including her heart?