Yellowstone National Park

One of the most direct books I've read on avoiding bears in the backcountry is Dave Smith's Backcountry Bear Basics, which just came out in its second edition.

I'm so impressed with Eric Blehm's "The Last Season," an accounting of the disappearance of Randy Morgenson, a backcountry ranger who spent 28 seasons in Sequoia/Kings Canyon National Parks before vanishing into a void. It's a mystery that perhaps will appeal largely only to parkies, but it's one masterfully told.

As Adams was a master with film, Moran was a master with canvas. Perhaps the definitive biography of Thomas Moran, this book traces his upbringing, his introduction to art, and his time spent in the parks.