They Came for Blood4 books in series
Invasion Day Publisher's Summary
David Osage is a dangerous man with a complicated past, but these days he’s just trying to keep his head down, driving big rigs.
Until one night, when he saddles himself with a hitchhiker - a nuisance who’s more than she seems - and everything changes. No one was ready for an alien invasion.
Death is raining from the sky, and the only question left is whether you run, fight, or submit. For David Osage and his family, answering is as easy as giving the alien invaders the finger.