Book'em Sadie (Iron Badges #1)
Danielle Norman

Widower, single-dad, Dr. Ryan Montgomery is in over his head. It's been four years since his wife's death and his former mother-in-law refuses to let him move on. When he finally starts dating, an accident makes him realize that dating a cop could put him right back in a world of grief and loss--a place he barely survived the first time around.
Now, two people who are used to saving others are forced to save themselves: one from a lonely future and one from a broken past.