Book excerpt: In Decade of the Wolf, project leader Douglas W. Smith and acclaimed nature writer Gary Ferguson describe the journey of thirty-one Canadian gray wolves that were released in 1995 and 1996 into Yellowstone National Park and the people who faithfully followed them. The wolves have not only survived but completely changed the ecosystem, spilling a fresh measure of wildness across the world’s first national park. This updated edition includes additional wolf profiles, newinformation on the effects of climate change and disease, and a retrospective on what the scientists have learned during this extended study of the Yellowstone wolves.