I loved this story as a 7 year old child. I found it compared very favourably with any of the Famous Five series, and any of the other individual stories I subsequently read.
It contains a clever plot with some surprising twists, all told at an exciting pace. There are moments of real suspense here.
The main character of the story is an American boy called Kit, who is brought to England by his guardian to escape from his 'wicked uncle', whom it is believed is behind an unsuccessful kidnap attempt. Kit stands to inherit the fortune of his missing-presumed-dead father, and this has tempted his uncle to attempt to ransom the boy.
Kit's adventures in England make entertaining reading for a 7-11 year old. The ironies of the plot are intricate for a children's book, and add colour to the tale.
The chapter illustrations are good, some of them being very atmospheric. They belong to a bygone age that should appeal to the more imaginative child whose mind has not been totally polluted by modernity.