First the more practical stuff. I think the book is very cheap, because I found for a much higher price somewhere else, but also because of its size and print quality (I expected something smaller). And it arrived very fast (I got super-fast shipping for free).
Now the book. I like that it has a lot of figures. I'm a scientist and usually have to read long, black and white papers, with only formal figures. Adding figures to text books is not cheap, but is makes is much more reader-friendly. Also, it is written in a non-scientific language so that anybody can read it, and it explains all necessary scientific terms. This might be a bit boring for those familiar with terminology, but I think its better that way, because this is NOT a scientific text book, it aims to reach wider audiences. thus, it has ''basic'' chapters on what biodiversity is and why is it threatened. Still, the book is essential for conservationists. It contains many hard data on why biological conservation is not just something we should promote because of aesthetic or recreational purposes but because of live and dead issues such as medical research and disease spreading. I would have liked though more than the seven groups of living organism that were reviewed in this book, for example fungi.
This book is somehow a mixture of scientific data with general environmental education. Something I will use for my work and also to share with my friends and (future) children.