Swan song

In a wasteland born of rage and fear, populated by monstrous creatures and marauding armies, earth's last survivors have been drawn into the final battle between good and evil, that will decide the fate of humanity: Sister, who discovers a strange and transformative glass artifact in the destroyed Manhattan streets ... Joshua Hutchins, the pro wrestler who takes refuge from the nuclear fallout at a Nebraska gas station ... and Swan, a young girl possessing special powers, who travels along Josh to a Missouri town where healing and recovery can begin with Swan's gift. But the ancient force behind earth's devastation is scouring the walking wounded for recruits for its relentless army, beginning with Swan herself--Publisher's description.