Sue Litchfield is a historian with a master's degree in history from Central Washington University who enjoys researching and writing about Roslyn's coal mine history. Her many articles have examined the relationship between the Northwestern Improvement Company, the largest coal mine company in the state, and the multi-ethnic population that settled in the Roslyn area. Litchfield was also the researcher and writer for three Washington State Library Rural Heritage Grants that digitized and uploaded over 400 historic Roslyn area photos.