Wright was a pioneer to the western U.S. who spent much of his life with grizzly bears. He started hunting as a young man around 1888. After almost twenty years of hunting, he started photographing bears and around 1906 made a transition from hunting to photography and observation. By the time he wrote the book in 1909, he had accumulated much knowledge of the grizzly. Moreover, he found that his experiences with the bears were at odds with the prevailing view of the animals.
The book is largely comprised of anecdotes of the author's experiences with the bears. While one tires of the ongoing need to hunt and kill the bears, even these situations tell much about their behavior. It becomes clear that the grizzly is a cautious animal. Even when staking out a carcass, the author finds tracks the next day that show that the grizzly came, looked and left. Similarly when using a thread as a camera tripline, the bears are observed to notice the thread even when walking quickly, stop to inspect it and then change their route to avoid it.
The last quarter of the book reviews the habits of the grizzly, based on Wright's experience. He found them to be essentially herbivores, their diet supplemented by fish and rodents. Large mammals are rarely killed, though "found" carcasses are fed upon. Bears will graze with other animals such as goats. Occasionally a grizzly will go rogue and become a cattle killer.
Wright addresses the question of the fierceness of the grizzly. Looking at many examples, he concludes that they are not aggressive, but will attack in self defense. He considers surprise encounters to be a form of the latter.
A worthwhile book with good insights into the character of the grizzly bear.