Sins of the Son - Lydia M. Hawke

A detective with a secret. An exiled angel out for vengeance. And a world teetering on the brink of disaster.

Homicide detective Alexandra Jarvis is still reeling from the loss of her soulmate and her brush with death at the hands of a Fallen Angel. The last thing she wants is to get involved again in the ongoing tug-of-war between Heaven and Hell. But when she sees Seth Benjamin's face plastered across a nationwide police bulletin, she knows she has no choice. 

As the only mortal aware of Seth's true nature, she needs to act fast if she's going to save Seth and give him a chance to stop Armageddon. And she'll have to go up against her former soulmate to do it.

Can Alex gain Seth's trust in time? Or will her fight to save him send the world over the edge into the very chaos she's desperately trying to avoid?