Lost Gods — Micah Yongo

A teenage assassin is hunted by his own Brotherhood as he seeks to uncover a supernatural conspiracy before it's too late.

Neythan is one of five adolescents trained and raised together by a mysterious brotherhood of assassins known as the Shedaím. When Neythan is framed for the murder of his closest friend, he pursues his betrayer, and in so doing learns there's far more to the Brotherhood, and the world, than he'd ever thought possible.