Released (Agents of Evil #1)

After a demon apocalypse kills their parents and everyone they know, 17-year old Abby Phillips, her brother, Carter, and friend, Max flee their home to travel through what has become the wastelands of America. When radio transmissions of a resistance offering shelter and safety cease, Abby is tempted to give up. Struggling to overcome life-threatening obstacles in their dangerous journey, Abby and her companions quickly discover there are much worse things lurking in the dark than they could have ever imagined.