One hundred and forty years after his assassination on April 14, 1865, AbrahamLincoln towers more than ever above the landscape of American politics. Inmyth and memory, he is always the Great Emancipator and savior of the Union, second in stature only to George Washington.But was Lincoln always so exalted?Was he, as some historians argue, a poorPresident, deeply disliked, whose legacy was ennobled only by John WilkesBooth's bullet?In this fascinating...