Conspiracy of One created a media sensation when it was first published in 1990. The first commercially-successful book to advance the theory that Lee Harvey Oswald acted alone, Conspiracy of One became a lightning rod for the assassination community. The 1990 hardcover is a sought-after collector's item today.

Author Jim Moore served as a research consultant for the Sixth Floor Museum at Dealey Plaza in Dallas, where he reconstructed the corner window from which Oswald fired and the corner stairway where the assassin's rifle was found. Moore has added a new Foreword, but kept the original text as it was issued. A must for any serious student of the assassination, Conspiracy of One is a thought-provoking discussion of the crime of the century and a chronicle of one man's obsession with the events of November 22, 1963.