Arrival (The Kyron Invasion Book 1) by Jasper T. Scott

THEY HAVE ARRIVED.
Chris Randall just lost his job. That night, while picking up his wife, Bree, from work, thunder cracks the sky, but there’s no lightning; then flaming debris rain across the valley, and a dark mass goes sailing out of the clouds, headed straight for LA.
It’s not one of the Union’s starships, because they can’t defy gravity like that. But then what is it?
The answer chills both Chris and Bree to their cores: it’s an invasion.
They need to get their kids and get out of the city before it’s too late.