It's okay. Not the best of the Boxcar mysteries, but not the worst either. I liked the focus on nature and environmentalism, but the book could have used a good proofread, I think. There's one part where the kids use paper napkins instead of plates while camping, because they don't want to be bothered with washing dishes... except they've been using paper plates the whole time, and burning them in the fire, so how they suddenly have crockery in the middle of nowhere I don't know. And the illustration of them in the station wagon doesn't match the text, with the kids sitting in different places. It's nothing big in either case, but sort of sloppy, you know?