The novel of the famous American writer Jack London's Moon Valley is the story of a young worker defeated by the iron fifth of an industrial octopus city and finding peace and joy in a life close to nature on a California ranch. This book describes historical events in America in the early twentieth century on the example of one family. The Great Depression has not yet begun, but tension is felt in the cities, clashes are taking place between the striking workers and strike breakers, which are supported by the police.