A mysterious string of earthquakes rocks the Midwest, and Donald Gardner senses all is not what it appears to be. At night, he hears crawling noises in the walls of his home and scratching sounds coming from the basement. Halloween is just around the corner, and an abandoned house in the neighborhood has a for-sale sign in the yard, piquing the curiosity of Donald and his friends.When Katie Samuelson, the pretty girl from Donald's sixth-grade class,...