Mystery always leads to adventure in the Secret Stories!
In Enid Blyton's classic Secret Stories mystery always leads to adventure.

Peggy, Mike, Nora, Jack and Prince Paul are staying in the remote, mysterious Moon Castle. But weird things begin happening almost immediately - paintings come to life, books fly off shelves and instruments make noises when no one is touching them! Can the children discover the truth behind the spooky goings-on inside Moon Castle?