Items with "Costello, Matthew J." as Credited Author
The 7th Guest (1 edition)Allein gegen die Dunkelheit (2 editions)
Alone Against the Dark (2 editions)
Daredevil: Guilt by Association (1 edition)
Escape from Horror Island (2 editions)
Final Challenge (1 edition)
Hex: Escort to Hell (1 edition)
KGB Doublecross (1 edition)
Lone Wolf and Cub Game (1 edition)
The Paradox Labyrinth (2 editions)
Robert Heinlein's Glory Road: Fate's Trick (1 edition)
Robert Silverberg's Majipoor: Revolt on Majipoor (2 editions)
The Thing in the Darkness (1 edition)
Wheel of Destruction (1 edition)