Follow the Carlton family as they explore the mystery surrounding the old clock in their hallway. This mystery includes puzzle-solving, a kidnapping, and a lot more. This intriguing novel was written in the 1960s and it reflects the time it was written. As such it lacks the use of common 21st-century technology. As a result, this mystery cannot be solved by Google search. This adds to the intrigue, as others get involved providing an element of danger that will keep you wondering what is going to happen next.