Book excerpt: The intimate, involving story of the rise and reign of O-Six, the fabled Yellowstone wolf, and the people who loved or feared her. With novelistic detail, Nate Blakeslee tells the gripping story of O-Six, a charismatic alpha female wolf. She's a kind and merciful leader, a fiercely intelligent fighter, and a doting mother. Beloved by wolf watchers, particularly Yellowstone park ranger Rick McIntyre, O-Six becomes something of a social media star, with followers around the world. But as she raises her pups and protects her pack, O-Six is being challenged on all fronts: by hunters and their professional guides, who compete with wolves for the elk they all prize; by cattle ranchers who are losing livestock and have the ear of politicians; and by other Yellowstone wolves who resent her dominance of the stunningly beautiful Lamar Valley. These forces collide in The Wolf, a riveting multigenerational wildlife saga that tells a larger story about the clash of values in the West--between those fighting for a vanishing way of life and those committed to restoring one of the country's most vibrant landscapes.