In 1913, at 71 years of age, acclaimed American journalist and author of popular "horror" fiction Ambrose Bierce set out on his final journey. It is a journey that has been shrouded in mystery ever since. What is known to history and biography is that Bierce visited the Civil War battlefields where he had fought in the Union Army. His destination was Mexico. His motivation for the Mexico journey remains unclear. Some say he was going to fight alongside Pancho Villa in the Mexican Revolution. Others say he wanted merely to report the war firsthand as he had done with his Civil War experiences....