Wielding a Red Sword by Piers Anthony, 313 pages

In this continuation of the Incarnations of Immortality series, Mym was a dutiful son, but his father interfered in his love life too often. Rather than wed without love, Mym takes up the Red Sword, symbol of office of the Incarnation of War. At first he thought his efforts could ameliorate some of the suffering caused by Earth's constant petty wars. But he found that behind all his involvement were the clever traps of Satan. When seeming mischance placed him in Hell, Mym organized a great rebellion among the Damned. And Satan seemed to capitulate. But free again, Mym learned that Satan had been busy stirring up riots and war. Now it seemed things had gone too far and Satan must surely win. There was only one desperate chance....