This is the second in the trilogy of the Undercover Brothers, Frank and Joe, investigating a saboteur in the extreme sports theme park. In the first book, they caught the culprit, but bad things continue to happen in this one and it seems there is another. This is filled with chase scenes, impressive skateboard tricks, and mysterious happenings. This mystery will capture the attention of the hard to please boys and girls who enjoy action and skateboarding. It kept me entertained and I am not the target age, to say the least. :)