Malice of Crows — Lila Bowen

The Ranger known as Rhett has shut down a terrible enterprise running on the blood of magical folk, but failed to catch the dark alchemist behind it. And now the Shadow refuses to let him rest.

Rhett must make the ultimate transformation if he has any hope of stopping the alchemist or fulfilling his destiny; he must become the leader of a new Rangers outpost.

To save his friends, and the lives of countless others, he'll first have to lead them on a mission more dangerous than anything they've ever faced.