LARRY LANGMAN is the author of A Guide to Silent Westerns (Greenwood, 1992), A Guide to American Crime Films of the Forties and Fifties (Greenwood, 1995), and American Film Cycles: The Silent Era (Greenwood, 1998).DAVID EBNER has taught mathematics and history on the university and secondary school levels and has published extensively in professional journals. His books include The Encyclopedia of American Spy Films.