What if the Allied invasion of Europe on D-Day had failed? The Mayflower had not sailed? The Mongols had succeeded in conquering Europe? JFK hadn't been assassinated? Napoleon had invaded North America? The South had won the Civil War? Go back in time and reimagine history as it might have been with the following fascinating titles:

Almost America: from the colonists to Clinton: a 'what if' history of the U.S. by Steve Tally

Almost history: close calls, plan B's, and twists of fate in American history by Roger Bruns