Mystery File #47: Article, Interview, and Bibliography for Michael Collins, Ed Lynskey & Steve Lewis, 2005.

The Mammoth Encyclopedia of Modern Crime Fiction, Mike Ashley, Carroll & Graf, 2002.

Sleuths, Sidekicks, And Stooges: An Annotated Bibliography Of Detectives, Their Assistants, And Their Rivals, In Crime, Mystery, And Adventure Fiction, Joseph Green and Jim Finch, Scolari Press/Ashgate, 1997.

St. James Guide to Crime And Mystery Writers, Jay P. Pederson, St. James Press, 1996.

Encyclopedia Mysteriosa, William L. DeAndrea, Prentice Hall, 1994.

A Reader’s Guide To The Private Eye Novel, Gary Warren Niebuhr, G. K. Hall and. Company, New York, 1993.

Trouble Is Their Business: Private Eyes In Fiction, Film, and Television 1927-1988, John Conquest, Garland, 1990.

Twentieth Century Crime and Mystery Writers, Third Edition, Ed. Lesley Henderson, St. James Press, Chicago and London, 1991.

Ibid. Second Edition, Ed. John M. Reilly, St. Martin’s Press, New York, 1985.

Ibid. First Edition, Ed. John M. Reilly, St. Martin’s Press, New York, 1980.

Contemporary Authors, New Revision Series, Vol. 22, Gale Research Co., Detroit, MI, 1988.

1001 Midnights: The Afficionado’s Guide To Mystery And Detective Fiction. Marcia Muller & Bill Pronzini, Arbor House, New York, 1986.

Öga Mot Öga, Carlssons Bokförlag, Stockholm, Sweden, 1986.

Panorama des maitres du polar etranger, L’Instant, Paris, France, 1986.

The American Private Eye, David Geherin, Frederick Unger Publishing Co., New York, 1985.

Private Eyes: 101 Knights: A survey of American Detective Fiction 1922-1984, Robert A. Baker and Michael T, Nietzel, Bowling Green State University Popular Press, Bowling Green, OH, 1985.

Clues: A Journal of Detection, "Dennis Lynds and the Social Conscience," Popular Culture Center, Bowling Green, OH, Spring-Summer, 1984.

Xenophile No. 38, "Private Eye in an Evil Time: Mark Sadler’s Paul Shaw,", Francis M. Nevins Jr., (March–April 1978): 11.