Mystery of the Puzzle Bones: Boardunders club series

Jaydon Caleb Ethan Brandon and Roscoe the dog have a great hideout. But something is leaving a strange Puzzle of Bones in the Boardunders club house. Something wants to lead them deep down into the sewers – into Hidden Town. A place that doesn’t want to be found and people who will do anything to protect their secret. Suddenly the danger becomes extreme as they are running for their lives. Who can they trust to help them? Puzzle Bones is the first of the Boardunders club series. The four young teenagers find a series of huge unused sewer pipes below an abandon home development and love skateboarding under ground where no one knows they are. They have a cool clubhouse with their own Play station and chairs. But then bones start to appear right at the dark entrance to the old pipes. Something is down there, something is arranging the bones. The boys go to investigate and find a mysterious hidden town with people who do not want to be found and will protect the secret at any cost.