Ambrose Gwinnett Bierce (June 24, 1842 – 1914?) was an American editorialist, journalist, short-story writer and satirist. Today, he is best known for his short story, An Occurrence at Owl Creek Bridge and his satirical dictionary, The Devil's Dictionary.

The sardonic view of human nature that informed his work – along with his vehemence as a critic – earned him the nickname "Bitter Bierce". Despite his reputation as a searing critic, however, Bierce was known to encourage younger writers, including poet George Sterling and fiction writer W. C. Morrow. He is known for his distinctive style of writing, which his stories often share. This includes a cold open, use of dark imagery, vague references to time, limited description, war-themed pieces and use of impossible events.

In 1913, Bierce traveled to Mexico to gain a firsthand perspective on that country's ongoing revolution. While traveling with rebel troops, the elderly writer disappeared without a trace.