The Mystery of the Hidden House (Enid Blyton's Mysteries Series)
By Enid Blyton.
Description
Where could Mr Goon's nephew have disappeared to? Mr Goon has forbidden the Five Find-Outers from solving mysteries - so they decide to make one up for his nephew, Ern! But what will happen when Ern disappears, and their pretend mystery turns into a real one? - from Amzon
ISBN(s)
0603564321, 9780603564321