In this action-packed adventure story for 8?11-year-olds, Ayla searches frantically for her Uncle Bob, who is believed to have been kidnapped.

Ayla and her parents have recently moved house, and she doesn't know much about the area or whether she'll find any new friends there.

Is the old bridge safe? Can she get inside the castle without being found? Who is the Riddleman and how dangerous is he?

Join Ayla and her new friends Milly and Jeffrey as they face dangerous situations and solve puzzles on the way to discovering what happened to Uncle Bob.