Dark is When the Devil Comes is a nail-biting mystery that keeps you guessing and gasping right to the very end! Pearce plumbs the depths of psychological torment for a truly upsetting mindf*ck: You never know what is real and what is just in your head, but always the stomach-churning assurance that things are gonna get worse at the hands of one of horror literature's most chilling psychos. I loved it!.