Isaac Asimov (c. January 2, 1920 – April 6, 1992) was an American writer and professor of biochemistry at Boston University. He was known for his works of science fiction and popular science. Asimov was a prolific author, writing or editing more than 500 books and an estimated 90,000 letters and postcards. His most famous work is the Foundation series, which, along with the Galactic Empire and Robot series, forms a significant portion of his science fiction universe.

Catherine Asaro (born November 6, 1955) is an American science fiction and fantasy author, singer, and teacher. She is best known for her Saga of the Skolian Empire series, which masterfully blends hard science fiction with romance elements.

Margaret Eleanor Atwood (born November 18, 1939) is a Canadian poet, novelist, literary critic, essayist, teacher, environmental activist, and inventor. She is best known for her works of fiction, including The Handmaid’s Tale and The Blind Assassin.

Yal Ayerdhal (26 January 1959 – 27 October 2015) was a French author renowned for his contributions to thriller and science fiction literature. Born in the La Croix-Rousse district of Lyon, Ayerdhal’s work often blended genres, reflecting his commitment to imaginative storytelling and political discourse.

Neal Asher (born February 4, 1961, in Billericay, Essex) is a British science fiction writer renowned for his expansive “Polity” universe and fast-paced storytelling.