The book "US Army in the Korean War: South to the Naktong, North to the Yalu" by Roy E. Appleman is a historical account published in 1961 by the U.S. Government Printing Office. It is part of a series on the military history of the United States and is aimed at a broad audience including young adults and adults. The book focuses on the Korean War era, specifically detailing the Army's operations from the southern to northern regions, with illustrations and maps included in the rear of the hardcover edition.