Robert Edward Vardeman (sometimes called Vardebob) (born 1947) is an American science fiction fan and writer.
He also wrote Gateway to Doom (1983) from Tom Swift III, and The Microbots (1992) and Mutant Beach (1992), part of the Tom Swift IV series of books under the house pen name, Victor Appleton; as well as writing numerous westerns under the pen names Karl Lassiter and Jackson Lowry.
Vardeman also wrote the novelizations of the fantasy game series, God of War and Ruins of Power, a MechWarrior: Dark Age story.
Vardeman's science fiction works include the Weapons of Chaos, Masters of Space and Biowarriors trilogies, and the stand-alone novels The Sandcats of Rhyl, Road to the Stars, and Ancient Heavens.
Vardeman also wrote a series of three mystery novels involving the "psychic detective" Peter Thorne: The Screaming Knife, The Resonance of Blood and Death Channels.