Magic Blood by S.A. Richards

Betrayed by her ex who broke her heart and her trust, Bree Somner is focusing her energies on taking care of her family, surviving, and protecting humans from vampires, trolls and demons in the new droid-controlled world.
After finding out she's half mage, Bree's got to hide her identity from witch hunters and the state while she proves her worth as a newly hired protector.
Working with the Protection Agency for Humans, she's been tasked with finding the creature responsible for the string of deaths of human girls in the Forbidden Forest.
Bree has to race against the clock to capture someone-or something-responsible before it's too late, with a sexy vampire watching her every move.