Items with "Costello, Matthew J." as Credited Author
Note: This list is sorted by the earliest known
dated edition for each title; earlier editions may exist.
Date Unknown
The 7th Guest1984
Final ChallengeThe Thing in the Darkness
1985
Alone Against the DarkWheel of Destruction
1986
Hex: Escort to Hell1987
KGB DoublecrossRobert Silverberg's Majipoor: Revolt on Majipoor
1988
Daredevil: Guilt by AssociationRobert Heinlein's Glory Road: Fate's Trick