Mystery of Spider Mountain — Jean Henry Mead

The Hamilton Kids live at the foot of a huge hill they call Spider Mountain. At the summit sits a dark house surrounded by evergreen trees and a wrought iron fence enclosing four large vicious dogs. What they find when they climb their mountain changes their lives forever. This middle grade novel includes humor, how to survive when lost in the forest, a Ouija board spirit named Bagnomi, a grandmother who resembles Ronald McDonald and a furniture chewing dog.