grizzlies vs black bears!
This contains research based, statistical information on bear attacks going back 100 years, and it's interesting. The book isn't quite as useful for avoiding an actual attack. Herrero gives conflicting information- sometimes black bears are more likely to attack than grizzlies, except when grizzlies are more likely to. Sometimes bears with their cubs will run, except when they charge. Sometimes bears run from gunshot, but not always. Climbing a tree can be useful, but be sure to get up high enough, and a black bear may follow you up. Herrero suggests a tent is some protection then a few pages later and in later chapters gives harrowing accounts of campers being dragged from their tents, mauled and eaten. His sometimes very specific information on what to do during an actual attack would be difficult to remember in the heat of the moment. Herrero admits bears are unpredictable and his respect & affection for them is obvious.