Joseph C. Goulden: ‘Stanton’ book review

STANTON: LINCOLN’S WAR SECRETARY By Walter Stahr Simon & Schuster, $35, 743 pages Although overshadowed in history by battlefield titans such as Gen. Ulysses S. Grant, Edwin Stanton was arguably President Abraham Lincoln’s most valuable ally during the Civil War. As secretary of war, Stanton faced the awesome first task of rapidly raising an army, and…