The Civil War had a moment of formal surrender between its generals at Appomattox in 1865, when the South's Robert E. Lee yielded to the North's Ulysses S. Grant.But the war never really ended.Ron Chernow, whose biography of Alexander Hamilton inspired a blockbuster Broadway musical, illustrates this in his latest book, "Grant." The war chapters are riveting, but he also takes readers into the less familiar t…
