My 9 year old son and I read this together and thoroughly enjoyed the ingenuity of the children and the pace of the drama near the conclusion. It has great vocabulary and enticing characters that complement one another at each new challenge.
My daughter and I read both books together and enjoyed them very much. The children are resourceful and entertaining, although the premise has some obvious holes. There is more danger and action this time around, but that makes for a more engaging storyline. Nothing to worry about in this book and much to enjoy.