Age of X novels

The truth is, when you banish the gods from the world, they eventually come back—with a vengeance.
 
In the near future, Justin March lives in exile from the Republic of United North America. After failing in his job as an investigator of religious groups and supernatural claims, Justin is surprised when he is sent back with a peculiar assignment—to solve a string of ritualistic murders steeped in seemingly unexplainable...