A Screw Loose: The Montana Files by Cameron Wright"This psychological thriller's uncanny element and blended formats create a chilling image of a murderer and his deadly appeal." Publishers Weekly What happens when the predator becomes the prey? Karcher Detention Centre houses some of the country's worst inmates. But not the ones you might be thinking of. Maximum Security Prison Officer Edward Montana felt that life for his inmates was a little too comfortable, given the severity of their crimes.