John McPhee is a noted master of creative non-fiction: factually accurate tales told in a literary manner. This work, an exploration of three wildernesses, and three interchanges between an environmentalist and his ideological enemies, is noted as an example of the genre, and a great read.
Here is a brief summary of the title, along with links to request the book from Miami, OhioLINK, and SearchOhio libraries (Just click "Request" and choose "Miami University" from the dropdown list. Then enter your UniqueID and password, and the library from which you would like to retrieve the item):
"The narratives in this book are of journeys made in three wildernesses - on a coastal island, in a Western mountain range, and on the Colorado River in the Grand Canyon. The four men portrayed here have different relationships to their environment, and they encounter each other on mountain trails, in forests and rapids, sometimes with reserve, sometimes with friendliness, sometimes fighting hard across a philosophical divide."