How does the Bibles teaching on the devil square with psychology and other modern scientific disciplines that seem to have driven Satan into the realm of myth? Why does 666 signify the devil? Is Satan the Antichrist or does that term refer to a human? These are legitimate questions because many popular writers and filmmakers have combined a number of diverse traditions, distorting Christian teaching and tradition about Satan and also occasionally distorting common sense. With his engaging and clear prose, Joseph F. Kelly introduces the reader of Who Is Satan? to what the Bible actually says about Satan and other evil biblical figures.