The Case Of The Toxic Spell Dump - Harry Turtledove

In an alternate America that runs on magic, a potential environmental disaster plunges an overworked bureaucrat into a deadly conspiracy of evil gods and darkest sorcery. David Fisher pushes paper for the EPA in a world that’s a lot like ours…only different. In this California - and throughout the alternate United States - all gods are real, science doesn’t exist, and magic rules everything, running imp-driven computers and creating anxiety-inducing bumper-to-bumper flying-carpet rush hours.