Gary W. Gallagher 
Fighting for the Confederacy [PDF ebook] 
The Personal Recollections of General Edward Porter Alexander

Originally published by UNC Press in 1989, Fighting for the Confederacy is one of the richest personal accounts in all of the vast literature on the Civil War. Alexander was involved in nearly all of the great battles of the East, from First Manassas through Appomattox, and his duties brought him into frequent contact with most of the high command of the Army of Northern Virginia, including Robert E. Lee, Stonewall Jackson, and James Longstreet. No other Civil War veteran of his stature matched Alexander’s ability to discuss operations in penetrating detail– this is especially true of his description of Gettysburg. His narrative is also remarkable for its utterly candid appraisals of leaders on both sides.