'Back at the manor...'
William and Thomas are at it again - solving crimes, uncovering mysteries and munching their way through a seemingly endless supply of Ginger Nuts!
What is the true meaning of the secret message?
Who has stashed a locked trunk in the old house and what's inside?
Who is stealing pedigree dogs?
How will they survive their adventure in a runaway balloon?
Can you help William and Thomas with their crazy enquiries?