Magic is an abomination—one that has grown tired of being hunted. The Inquisitors have hunted magical creatures for a dozen years, striking fear into the monsters that dare to escape the Rift. In the swamps in Northern Ocker, however, a new evil arises—one that's not afraid of Inquisitors. One that's hunting Inquisitors. One that's killing Inquisitors. Still reeling from the pain of recent events, Simon is more than willing to walk into danger. But now he and Luthor must hunt this new evil into the very house of The Sanitarium. And the madness seems to be catching… Apatura Iris is the fourth book in the Magic and Machinery series by Jon Messenger.