"A boy here! There is no boy here at all!" These words came from the fierce looking woman as she glared at Robin, Betty and Lucy. But the children knew there was a boy living in the large house next door. So why did the she say that? What is the mystery of the boy? The children are soon in the middle of an amazing adventure, with 'the boy next door', including a wicked uncle, a house-boat and kidnappers! This is a most exciting book, one of Blyton's best, and you can't put it down until finished!
