James Ramsey Ullman (August 21, 1907 – June 20, 1971) was an American writer and mountaineer. He was born in New York City. He was not a "high end" climber, but his writing made him an honorary member of that circle. Most of his books were about mountaineering and geography. High Conquest was the first of nine books for the J.B. Lippincott company coming out in 1941 followed by The White Tower, River of The Sun, Windom's Way, and Banner in the Sky which was a 1955 Newbery Honor book. All of these titles became small motion pictures.