In Essential Yellowstone: A Landscape of Memory and Wonder (Riverbend Publishing, $20), Michael Yachim provides a detailed account of his adventures in the Park. Diagnosed with ALS in his later years, Yachim's insight and passion about some of our last great wilderness serves to ignite the fervor for adventure of anyone who flips through the book's pages. His treks through Yellowstone involve howling wolves and erupting geysers. His powerful memories tug at your heartstrings, while his self-deprecating experiences leave you laughing. Incredible photos of the landscape complement the text, as do comprehensive maps and trail descriptions. An impressively vivid account of the geographic and geologic features of the Park, Essential Yellowstone is also a ballad to the wonders of this majestic land.