An Ethereal End - Chris J. Cranford

In City of the Dead Grimm saved Jen's sister. But he also lost his game with Azazel.

And Jen.

Now Dead Zones scatter the earth, undead metropolises of the underworld, built by the demon upon the bones of cities of men.

Grimm stands at the first of those zones: New Orleans. Wondering what else the Dead Zone might cost him. Wondering what it might cost his friends. Wondering if he can get Jen back.

Regardless of the cost.