The World of Green Hills: Observations of Nature and Human Nature in the Blue Mountains is a book written by author Bradford Torrei. In his work, he carefully examines nature and the human attitude towards it in the picturesque Blue Mountains. With the help of vivid descriptions and apt observations, the author takes readers on an exciting journey through green valleys, meadows and forests, revealing the inner complexities of nature and human character. The book "The World of Green Hills" is an excellent combination of lyrics, philosophy and a sense of adventure that will leave an indelible impression on any lover of nature literature.