Under A Dark Sky ā€“ Johan M. Dahlgren

On rebel planet Elysium, a man is executed on a live video streamed by religious extremists. Nothing terribly original so far for Elysium.

Only this time, the man doesn’t die.

When security expert Asher Perez is sent to find him, it becomes clear that nobody in the rebel colony is who they seem, and that something dark is stirring in the shadows.

Something that has been watching humanity since the dawn of history.