The author is a widely published nature writer. In this book he travels through New Mexico, Utah, Arizona and California documenting the decline of the ponderosa pine. He provides background on the evolution of the ponderosa, its place in the culture of the west and information about the different varieties of the ponderosa. Basically his premise is that the ponderosa is in decline and may disapear. Mostly this book is the story of the effects of climate change and how it is reshaping the landscape, in particular in the western US. Very good writing.