Neither his business degree nor his powerful thunderbird magic could prepare Josiah Hightower for the weird chaos of the Mythical Creatures Elimination Squad in Kansas City.He became a warden in this disorganized agency to study Evolutionaries. According to science, Evolutionaries are mutants: humans who evolved to battle the monsters that volcanoes in the West produce at high volume. But as a human with magic, Josiah knows science can't always explain monsters . . . or people. The best method to cure his ignorance of Evolutionaries is to work with them.But before Josiah can even focus on the mystery of Evolutionaries, he's challenged by an intelligent predator that sees him as a threat, a sexy biologist who wants to experiment behind closed doors, and an Evolutionary phenom who promises to be a pain in his ass for years to come.