Ambrose Gwinnett Bierce was an American short story writer, journalist, poet, and American Civil War veteran. His book The Devil's Dictionary was named one of "The 100 Greatest Masterpieces of American Literature" by the American Revolution Bicentennial Administration. His story "An Occurrence at Owl Creek Bridge" has been described as "one of the most famous and frequently anthologized stories in American literature", and his book Tales of Soldiers and Civilians was named by the Grolier Club one of the 100 most influential American books printed before 1900.

Ambrose Goddard Hesketh Pratt was an Australian writer born into a cultivated family in Forbes, New South Wales.

Amelia Edith Huddleston Barr was a British novelist and teacher. Many of the plots of her stories are laid in Scotland and England. The scenes are from her girlhood recollection of surroundings. Her works include, Jan Vedder's Wife, A Border Shepherdess, Feet of Clay, Friend Olivia, The Bow of Orange Ribbon, Remember the Alamo, She Loved a Sailor, A Daughter of Fife, The Squire of Sanddal Side, Paul and Christina, Master of His Fate, The Household of McNeil, The Last of the Macallisters, Between Two Loves, A Sister to Esau, A Rose of a Hundred Leaves, A Singer from the Sea, The Beads of Tasmer, The Hallam Succession, The Lone House, Christopher and Other Stories, The Lost Silver of Briffault.

Amelia Gere Mason (1831–1923) was an American writer.

Amelia Opie was an English author who published numerous novels in the Romantic period up to 1828. A Bluestocking, Opie was also a leading abolitionist in Norwich, England. Hers was the first of 187,000 names presented to the British Parliament on a petition from women to stop slavery.

Ammianus Marcellinus, occasionally anglicised as Ammian, was a Roman soldier and historian who wrote the penultimate major historical account surviving from antiquity. His work, known as the Res gestae, chronicled in Latin the history of Rome from the accession of the Emperor Nerva in 96 to the death of Valens at the Battle of Adrianople in 378, although only the sections covering the period 353 to 378 survive.

Amos Bronson Alcott was an American teacher, writer, philosopher, and reformer. As an educator, Alcott pioneered new ways of interacting with young students, focusing on a conversational style, and avoided traditional punishment. He hoped to perfect the human spirit and, to that end, advocated a plant-based diet. He was also an abolitionist and an advocate for women's rights.

Amy Catherine Walton, born Amy Catherine Deck and better known as Mrs O. F. Walton, was an English author of Christian children's books, mainly but not exclusively fictional. She was the daughter of an Anglican priest and married his curate, with whom she spent four years living in Jerusalem.

Amy Ella Blanchard was a prolific American writer of children's literature.

Amy Lawrence Lowell was an American poet of the imagist school, which promoted a return to classical values. She posthumously won the Pulitzer Prize for Poetry in 1926.