The book is tained by the publisher. It's a perfectly valid reason in a very complex and delicate debate, such as climate change and pharma innovation regulation.

Even if the book is fine, it might not be the total picture, thus it could mislead you by omission. And it can be totally in good faith, it's just bias.

So, even if the book is a good overview, it's just a voice in a discussion, and without hearing what others think of the book, it's pretty good to go by what one knows of the publisher.