The Synner: Godfall (Paperback) (ISBN-13: 9798992073966)

Thoma and Ysevel are trapped in the Underworld. With no way home, they're forced to embrace new powers and allies to make their way back to the Between. Unfortunately, the dark power still stands in their way, leaving them with only two choices: fight or die trying.
As their friends and family scramble to help them find a way back, the other countries of the world begin to shift in power, revealing some dark secrets that should have been kept beneath the surface.
Will they be able to make it back, or be consumed by the dark forces that rule the Underworld?