CORNELL, P., DAY, M., TOPPING, K. (1998) X-Treme Possibilities: A Comprehensively Expanded Rummage Through Five Years of the X-Files. Virgin.
(1997) X-treme possibilities: a paranoid rummage through The X-files. Virgin.
EDWARDS, Ted (1997) X-Files Confidential: The Unauthorized X-Philes Compendium. Little Brown & Company.
GENGE, Ngaire (1995) The unofficial X-files companion: an X-phile's guide to the mysteries, conspiracies, and really strange truths behind the show. Crown Trade Paperbacks.
GRADNITZER, L., PITTSON, T. (1999) X Marks the Spot: On Location with the X-Files. Arsenal Pulp Press.
GOLDMAN, Jane (1996) The X-files book of the unexplained. HarperPrism.
HATFIELD, J., BURT, G. (1996) The Unauthorized X-Files Challenge: Everything You Ever Wanted to Know About Tv's Most Incredible Show. Kensington Books.
HURWITZ, M., CARTER, C. (2009) The Complete X-Files: Behind the Series, the Myths, and the Movies. Insight Editions LLC.
LAVERY, D., HAGUE, A., CARTWRIGHT, M. (1996) Deny all knowledge: reading The X files. Syracuse University Press.
LOWRY, B., CARTER, C., STEGALL, S. (1996) Trust no one: the official third season guide to the X files. HarperPrism.
(1995) The truth is out there: the official guide to the X-files. HarperCollins.