High Quality Content by WIKIPEDIA articles! Rage is a mystery novel by American author Jonathan Kellerman. Jonathan Kellerman (born August 9, 1949) is an American psychologist, and Edgar Award winning author of numerous bestselling suspense novels. His writings on psychology (and specifically psychopathology) include Savage Spawn: Reflections on Violent Children. Most of his fictional stories feature the character of Alex Delaware, a child psychologist who consults for the police. He has also written several essays and children's books.