There are many nature books.
From the side of nature the author provides not only clear, vivid accounts of the five areas.
On the political side, it strikes a positive note, describing the substantial environmental accomplishments of Senator Ralph Yarborough of Texas which, if they are now largely forgotten, remain significant contributions to his state and his country.
This book, a hybrid of nature and political history, presents the best of both.
There are many, many more political ones.
There are many nature books