In 1974, Michael Shaara's novel "The Killer Angels" about the Battle of Gettysburg was published, and was based in part on Longstreet's memoirs. In 1993 the book was adapted into a film, "Gettysburg", with Tom Berenger portraying Longstreet. He is depicted very favorably in both, significantly improving his standing in popular imagination. "God and General Longstreet" (1982), also upgraded Longstreet "through an attack on Lee, the Lost Cause, and the Virginia revisionists". In 1993, Wert published a new Longstreet biography, stating that his subject was "the finest corps commander in the Army of Northern Virginia; in fact, he was arguably the best corps commander in the conflict on either side." Military historian Richard L. DiNardo wrote, "Even Longstreet's most virulent critics have conceded that he put together the best staff employed by any commander, and that his "de facto" chief of staff, Lieutenant Colonel G. Moxley Sorrel, was the best staff officer in the Confederacy." Noting Longstreet's effectively delegating responsibilities for control of battlefield movements to his staff, DiNardo believed this allowed them to communicate more effectively during battles than the staffs of other Confederate generals during the war.