Fantastic setting created by Lisa Hartjes,
From the publisher:
For centuries, a war has been fought in secret, hidden away from the public and covered up by powerful organizations. Our enemy is a race of demons from beyond the dimensional barrier that surrounds Earth. They seek to warp the world, to taint it with their magic, and through that taint, control it.
The war has expanded beyond us now, with new powers entering the arena. Paranormals are being recruited or created by the demons and their followers, and it is starting to tip the balance in their favor. We must do as they have and start looking beyond our numbers to find allies. If we cannot tell them the truth about the war, then the least we can do is point them in the right direction.