The book "The Early Settler Lumberjack as Related to Lumbering in the Northwestern States," written by George Henry Warren, is an important document about the early years of forest development in the American Northwest Territories. The book tells about the life and work of pioneers who worked in forestry, highlighting their origins, challenges and achievements. The author describes in detail the techniques of woodcutting, the use of various tools and methods of wood processing. This book is a valuable source of information for those interested in the history of forestry and forest development in North America.