I would personally give this 3 stars, but my high school son LOVES this book and would give it 5, hence the 4 star average rating.
This book has a LOT of facts, like 5,000 of them, and it was rather overwhelming for me. My son, however, has spent hours pouring over this book and reciting all kinds of facts to me, so I'm glad he's enjoying learning.
This book talks about millipedes, animals markings, birds' nests, predators, animal senses, animals in the movies, and tons of other things. While most of the pages and facts are okay, some of them are jammed so full of words that I didn't even want to read them.