It's Men In Black meets CSI:Miami!
He's a Florida cop. She's an intergalactic zombie hunter. Saving Earth is the least of their problems...

Bahia Vista homicide detective Theo Petrakos thought he'd seen it all. Then a mummified corpse and a room full of futuristic hardware sends Guardian Force commander Jorie Mikkalah into his life. Before the night's through, he's become her unofficial partner--and official prisoner--in a race to save the Earth. And that's only the start of his troubles.

Jorie's mission is to stop a deadly infestation of bio-mechanical organisms from using Earth as a breeding ground. If she succeeds, she could save a world and win a captaincy. But she needs Theo's help, even if their unlikely partnership threatens to set off an intergalactic incident, and forces her to choose between a planet and a promotion--and a man who's become far more important than she cares to admit...