Angel Radio by A.M. Blaushild
It is on the cusp of summer that strange angels of eyes and wings appear throughout the world, and a week later all of humanity is dead. Except one girl. Months later, Erika Cantor continues to wander her desolate hometown without purpose or answers—until a strange radio broadcast sends her into the dangerous world outside—a world past civilization, whose only inhabitants are monsters and demons.
There, Erika meets Midori, a naive girl with a cryptic connection to the angels, and Gav, a boy who seems to have knowledge he refuses to share with Erika. The appearance of the mysterious Fex raises even more questions. Can he be trusted?
As Erika travels across Vermont searching for some remnant of society, she learns that there’s a reason she survived—that the angels, horrid creatures that they are—have a plan for her.