Sins of the Lost (Grigori Legacy)

Armageddon just got personal
 
Homicide detective Alexandra Jarvis's world is crumbling around her. As Lucifer continues to build his Nephilim army, Alex's fight to stem humanity's rising panic leaves little room in her life for her fledgling relationship with Seth, the man with Heavenly roots who has captured her heart.
 
Then the Nephilim children begin disappearing, Lucifer takes Alex's own vulnerable niece, and Heaven demands Seth's return. Suddenly, Armageddon isn't just looming, it's personal.
 
Faced with betraying the man she loves, Alex turns to the Archangel Aramael, the soulmate she once rejected, who may be her last chance to save her family--and humanity--from the coming apocalypse.