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Six years after starting Eject! Eject! Eject!, Whittle began writing as a guest columnist for the National Review Online. Both his original essays and National Review columns have been cited by authors William DeMersseman, Jim Geraghty, and Frank Miniter. Crime fiction author Robert Ferrigno used an excerpt from Whittle's essay "The Undefended City" for the introduction of his 2009 novel "Heart of the Assassin".