Adele Garrison was the pen name of Nana Belle Springer White, an American writer. Her daily newspaper column, a serial story called Revelations of a Wife, ran in multiple American newspapers from 1915 until the Depression.

Adeline Sergeant was an English writer.

Adeline Trafton Knox was an American writer and novelist, she published most of her work in the 1870s.

Carl Gustav Adolf von Harnack was a Baltic German Lutheran theologian and prominent Church historian. He produced many religious publications from 1873 to 1912. He was ennobled in 1914.

Adolf Hausrath, a German theologian, was born at Karlsruhe.

Louis Marc Adolphe Belot was a French playwright and novelist. He was born on 6 November 1829 in Pointe-à-Pitre, and died on 18 December 1890 in Paris.

Aeschylus was an ancient Greek tragedian, and is often described as the father of tragedy. Academic knowledge of the genre begins with his work, and understanding of earlier Greek tragedy is largely based on inferences made from reading his surviving plays. According to Aristotle, he expanded the number of characters in the theatre and allowed conflict among them. Formerly, characters interacted only with the chorus.

Aesop was a Greek fabulist and storyteller credited with a number of fables now collectively known as Aesop's Fables. Although his existence remains unclear and no writings by him survive, numerous tales credited to him were gathered across the centuries and in many languages in a storytelling tradition that continues to this day. Many of the tales associated with him are characterized by anthropomorphic animal characters.

Dame Agatha Mary Clarissa Christie, Lady Mallowan, was an English writer known for her 66 detective novels and 14 short story collections, particularly those revolving around fictional detectives Hercule Poirot and Miss Marple. She also wrote the world's longest-running play, the murder mystery The Mousetrap, which has been performed in the West End since 1952. A writer during the "Golden Age of Detective Fiction", Christie has been called the "Queen of Crime". She also wrote six novels under the pseudonym Mary Westmacott. In 1971, she was made a Dame (DBE) by Queen Elizabeth II for her contributions to literature. Guinness World Records lists Christie as the best-selling fiction writer of all time, her novels having sold more than two billion copies.

Agnes Blake Poor was an American author and translator. She wrote under her own name and the pen name Dorothy Prescott. She is thought to be the first American to translate Brazilian poetry from Portuguese into English.