David William Pringle. The Ultimate Encyclopedia of Science Fiction: The Definitive Illustrated Guide (London: Carlton, 1996) [encyclopedia: hb/photographic]
Sam Lundwall. Bibliografi över science fiction & fantasy 1741-1996 ["Bibliography of Science Fiction & Fantasy 1741-1996"] (Stockholm, Sweden: Lundwall Fakta & fantasi, 1997) [bibliography: hb/]
Sam Lundwall.Illustrerad bibliografi over science fiction & fantasy 1741-1973. ["Illustrated Bibliography of Science Fiction & Fantasy, 1741-1973"] (Stockholm, Sweden: Lindqvist, 1974) [bibliography: hb/]
Andrzej Niewiadowski, Antoni Smuszkiewicz, Leksykon polskiej literatury fantastycznonaukowej, Wydawnictwo Poznańskie, Poznań 1990, ISBN 83-210-0892-5
James Edwin Gunn. Inside Science Fiction: Essays on Fantastic Literature (San Bernardino, California: The Borgo Press, 1992) [nonfiction: coll: hb/]
George Reginald Turner. The Unrelenting Gaze: George Turner's Non-Fiction: A Selection (Collingwood, Victoria: SF Commentary 76, 2000) [nonfiction: coll: pb/Ditmar]
Sheldon Ronald Jaffery. Horrors and Unpleasantries: A Bibliographical History and Collector's Price Guide to Arkham House (Bowling Green, Ohio: Bowling Green University Popular Press, 1982) [nonfiction: hb/Gary Drumm]