This is an amazing and extremely interesting book.  There are lots of great cave photos.  The end of the book has a few pages with a chart listing and sorting many of the details and information in the book.  After teaching you about all the different things people study in caves, and people through history who have pioneered this research, they teach you how to prepare, and how to safely go caving.  The glossary has many words that will probably be new to young readers.  I would have liked to have seen a pronunciation guide on the words in the glossary as well.

This is a wonderful addition to our science collection.