Ambrose Bierce 
Son of the Gods, and A Horseman in the Sky [PDF ebook] 

Today, Ambrose Bierce is best remembered for his blazingly satirical take on politics and society in general, which was probably best encapsulated in The Devil’s Dictionary. However, Bierce paid his literary dues as a war reporter, and battlefield conflicts were a frequent topic of his fiction. A Son of the Gods, and A Horseman in the Sky brings together a pair of exquisitely observed short tales of the American Civil War.