"Triangle Histories" introduce a new concept to American history series. Each title in the 2-vol. collection interweaves and overlaps with others in its own unique way. And each title provides a different perspective on the subject. For example, The Battle of Vicksburg, the biography Ulysses S. Grant, and the biography Abraham Lincoln, overlap and intersect at a number of points. Grant was the Union commander at Vicksburg at a time when Lincoln was...