"Kraaaaa-SLAM!" It's another of the mysteries in the Chelsea Kids Adventure Series. Holt goes on a backpacking trip with his uncle and cousin on a huge island, Isle Royale, in the middle of Lake Superior. His keen eye for the unusual and his innocent ability for crossing lines of danger offers a gripping tale of right and wrong. "Dr. Bob" takes you to this faraway place because he's been there many times and intimately knows the challenges it has within its shorelines.