The Chosen — Edward Willett

It's the late 21st century, and after economic collapse and a "small" war, civilization is in pretty bad shape. On the Canadian prairies, a religious cult, the Chosen, has dedicated itself to destroying all vestiges of the old technological civilization--but only a few hundred kilometres away, the Technos are just as dedicated to rebuilding it. The two cultures are on a collision course that could mean the first war of the new era, and mutual destruction, unless the teenage daughter of the cult's leader and a boy from the Technos can overcome their own personal differences and prevent it...no matter what the cost.