Sentinel by Jamie Foley

The meteor storm wasn’t such a big deal until a comet landed in the middle of the road. Now Darien’s car is wrecked, his sister is bleeding out, and the only medical aid is at the reclusive Serran Academy.

Jet sees Darien for what he is: a lost teen who doesn’t deserve to know about the aether gifts. And his sister’s rare future-seeing ability is exactly what the enemy is after.

As fractured governments and shadow organizations vie for control of a dying world, the Serran Academy students—and their angelic secrets—are targeted for harvesting.