Describes the efforts to reintroduce wolves in Yellowstone National Park after they were nearly hunted to extinction, and explores how this restored the ecosystem of Yellowstone. Discusses the conflict between conservationists and those who live around the park, and highlights other endangered species around the world that were brought back from extinction by similar reintroduction efforts. Includes color illustrations and back matter on the original fourteen wolves reintroduced into the park.

"First published in Great Britain as Fourteen wolves in April 2021 by Bloomsbury Publishing Plc"--Title page verso.