Books like American Earth
Bill McKibben, Henry David Thoreau, George Catlin, Lydia H. Sigourney, Susan Fenimore Cooper, Walt Whitman, George P. Marsh, P. T. Barnum, J. Muir, W. H. H. Murray, Frederick Law Olmsted, Jr., J. Sterling Morton, Theodore Roosevelt, Mary Austin, Nathaniel Southgate Shaler, John Burroughs, Gifford Pinchot, William T. Hornaday, Theodore Dreiser, Gene Stratton-Porter, Henry Beston, Benton MacKaye, Robert Marshall, Don Marquis, Caroline A. Henderson, Donald Culross Peattie, Robinson Jeffers, John Steinbeck, Woodie Guthrie, Marjory Stoneman Douglas, Aldo Leopold, Berton Roueché, Edwin Way Teale, Helen Nearing, Scott Nearing, Sigurd F. Olson, E. B. White, Loren Eiseley, William O. Douglas, Jane Jacobs, Rachel Carson, Russell Baker, Eliot Porter, Howard Zahniser, Lyndon B. Johnson, Kenneth E. Boulding, Lynn White Jr, Edward Abbey, Paul R. Ehrlich, Garrett Hardin, Philip K. Dick, Colin Fletcher, R. Buckminster Fuller, Stephanie Mills, Gary Snyder, Denis Hayes, Joseph Lelyveld, Joni Mitchell, Marvin Gaye, John McPhee, Wendell Berry, Annie Dillard, Lewis Thomas
American Earth is 974 pages, about 17 hours 51 minutes at 250 words a minute.
6 books to read next
How long each takes
Ecotopia 4.0 h 
A Sand County Almanac 4.9 h 
The Ecocriticism Reader 7.6 h 
Wilding 7.0 h Ideas to Postpone the End of the World 1.6 h 
Sunvault 4.7 h Bar height shows length. Estimated at 250 words a minute.