The Outworlder by Natalie J. Holden

SPFBO7

When two worlds clash, one man must choose a side. When Aldeaith joined the army, he left everything behind. His world, his family, everyone who thought him a fool. The new routine gave him a sense of security, and fighting proved easier than talking to people. But the peace couldn’t last forever. In the Empire spanning thousands of worlds, there are bound to be dissidents. Dealing with them is a part of Aldeaith’s job and the most advanced magic known to man makes it easy. But no magic can help him when the rebels are people he grew up with. Now, he has to pick a side and prove his loyalty among mounting distrust. To come on top, he must learn to navigate something trickier than any battlefield: other people. The fate of the Empire depends on it.