The Best Alternate History Stories of the 20th Century

A ghostly ferry makes passages between coexisting ""different Earths""; a 20th-century man describes his impact on the Civil War, brought about by time-machine tricks; and Mozart, Thomas Jefferson and Marie Antoinette end up as employees at an oil refinery in The Best Alternate History Stories of the 20th Century, edited by Harry Turtledove with Martin H. Greenberg. Contributors include Poul Anderson, Kim Stanley Robinson, Ward Moore and Susan Shwartz.