Danny Calloway and the Puzzle House

Thirteen-year-old Danny Calloway thinks he's just a weird kid. His ability to solve complex mathematical equations and decipher cryptic messages in the blink of an eye has made him a school outcast, and recently he's grown more and more certain that someone is following him around — someone who dodges out of sight whenever Danny tries to spot them. But when he inherits the deed to a long-forgotten estate of his grandfather’s, wheels are set in motion that change the course of his life forever. Danny is soon swept into an exciting tapestry of hidden passageways, secret codes and head scratching riddles, and his race against time may just be a race for his very life. In order to come out of his adventure unscathed, Danny must solve the mystery of the Puzzle House before it's too late.