Man in the Iron Mask one ever saw his face because it was hidden by a mask of black velvet cloth, the true identity of the prisoner remains a mystery; it has been extensively debated by historians, and various theories have been expounded in numerous books and films. Among the leading theories are those proposed by writer and philosopher Voltaire: he claimed in the second edition of his "Questions sur l'Encyclopédie" (1771) that the prisoner wore a mask made of iron rather than of cloth, and that he was the older, illegitimate brother of Louis XIV. What little is known about the historical Man in
The Iron Man (novel) later wrote a sequel, "The Iron Woman" (1993), describing retribution based on environmental themes related to pollution. The first North American edition was also published in 1968, by Harper & Row with illustrations by Robert Nadler. Its main title was changed to The Iron Giant, and internal mentions of the metal man changed to iron giant, to avoid confusion with the Marvel Comics character Iron Man. American editions have continued the practice, as Iron Man has become a multimedia franchise. Faber and Faber published a new edition in 1985 with illustrations by Andrew Davidson, for which Hughes and Davidson won