This is certainly one of the worst books in the series not to be outdone by a few others. The book is packed with an adequate amount of action - yet it was still rather difficult to remain interested. The brothers are hardly in Bayport, the writing is weak, and the is little to no mystery whatsoever. The theme is ballooning and naturally it is Chet's hobby. ... The brothers had a lot of interaction with the criminals which was good, and I rank this a strong one star, but not deserving of a 2. RATED D.