«Demon in My View» by Tom Henighan

Commended for the 2008 Best Books for Kids and Teens
The year is 2099. North America is in chaos, ruined by years of war, terrorism, and ecological destruction. Marauding motorcycle gangs roam the land, while a secret society of mutants who practice devilish rites terrorize the innocent. Young Toby Johnson lives with his father, one of the Old Believers, a religious sect that clings to stern moral values. Although embarrassed by his father's quaint ways, Toby is horrified when a motorcycle gang attacks their modest homestead.
To help the old man, the boy must travel with his dog across the dangerous countryside, a journey on which he is joined by a mysterious black man named Jim White, who seems to be in touch with higher powers and may himself be angel or demon. In the end Toby earns a saving gift for his father and meets Sarah clever, beautiful, and haunted by a demonic past who will change his life forever. A retelling of the biblical Book of Tobit, Demon in My View is a powerful breakthrough novel.