Angel Burn by L.A. Weatherly
3 out of 5
In the world of Angel Burn, angels are horrible creatures from another dimension that drain human energy to feed. Angel Burn, as the result is called, causes sickness, mental illness and even death in the humans, who don't realize that the angels are harmful. There are only a few that know about it and fight by killing the angels.
When Alex, an Angel Killer, gets a text about his next target, he doesn't know it's anything out of the ordinary. But then he gets there and finds Willow- not quite angel and not quite human. Apparently, she's the one and only half-angel and the angels see that she is a threat to them all. Alex is repulsed by Willow's angel side, but is determined to protect her seeing the angels see her as such a threat.
With the angels and their followers from The Church of Angels on their tail, Alex and Willow make the long trek across country. This is actually the majority of the book. They travel. They hide. They bond. They fall in love.
Spoilers ahead