This book is well written, by a man who is passionate about its subject matter, and it is very evocative of the enormity and the grandeur of the America west. But this book is not for everyone; in fact, it is for very few, which is the reason for my middling three-star rating. The title focuses on the story of mountain man John Colter, but it is really a more general examination of the lives of the mountain men, which is an incredibly narrowly focused, esoteric subject matter. If one has visited the Rockies, especially Yellowstone country (three times for me), or has always had a romantic identification with the original American mountain men (my elementary school reading was primarily young American history books), then this book will resonate. But bear in mind, it is not really about Colter. He could not write very well, and he spent most of his adult life on his own in the wilderness, so he did not leave much of a written record. The details of his life come from the writings of others who knew him and heard his stories (including his compatriots on the Lewis and Clark expedition). Thus the book, by necessity, is full of "speculative" language: "may have," "probably," "possibly." But the segments about the various components of mountain man life in the west are quite interesting. There are sections about their diet, what they carried in their packs, the animals that threatened them, etc. The most detailed story about Colter, about his harrowing escape from the Blackfeet, running for miles wearing nothing but a smile, was provided by a fellow mountain man who heard Colter tell the tale. The passages about his travels in the Rockies brought back my thoughts, sometimes while stuck in traffic in Yellowstone National Park, of what it must have been like to have been in that part of the nation two hundred years ago. And I found something to put on my (very short) "bucket list": the carving on a cliff in Montana of William Clark's name, which he made during the famous expedition.