I saw this one recommended on social media and checked it out at my local library. It is rated for kids 5-8, but I wonder if they might need adult help with some of the concepts. Then again, kids these days are much more knowledgeable than I was at those ages.

The content is excellent. Gall presents both the science and history of diving, back to the ancient Greeks. The illustrations are clear, help explain concepts, and are fun to look at. I think it is odd that most of the humans look sad or are expressionless. At the back of the book, there is a glossary, a list of sources, and fun facts (like that falling coconuts kill more people annually than sharks, an average of 150 vs. 10).