The U.S. Army in the Korean War Commemorative WebsiteA website from the US Army Center of Military History. Includes readable versions of the official US commemorative pamphlets and official history of the war.
Pamphlets: "The Outbreak," "The UN Offensive," "The Chinese Intervention," "Restoring the Balance," and "Years of Stalemate."
Books "U.S. Army in the Korean War" : "Policy and Direction - The First Year" by Schnabel, "South to the Naktong, North to the Yalu" by Appleman, "Truce Tent and Fighting Front" by Hermes, and "Ebb and Flow, November 1950-July 1951" by Mossman.