| Aron, Geraldine (4) | Aronson, Will (1) | Aronson, Billy (1) |
| Arvetis, Tom (2) | Asare, Masi (2) | Ashby, Sylvia (1) |
| Asher, Sandra Fenichel (32) | Ashman, Howard (1) | Ashton, Zawe (1) |
| Ashwander, Donald (3) | Askari, Brent (1) | Aspengren, Kate (1) |
| Atallah, Carissa (1) | Atik, Chiara (1) | Atkins, Eileen (1) |
| Atkinson, Eunice (1) | Atkinson, Grant (1) | Attar, Farid ud-Din (1) |
| Attenborough, Richard (1) | Attwell, Kate (1) | Auburn, David (1) |
| August, Ian (2) | August, John (3) | Aulger, Addison (1) |
| Aument, Matt (1) | Austen, Alice (1) | Austen, Jane (24) |
| Austin, Tom (1) | Authors, Various (3) | Auty, Stewart (2) |
| Averill, Ric (24) | Averill, Jeanne (1) | Averill, Will (2) |
| Avery, Helen P. (2) | Avi, Avi (3) | Axler, Rachel (1) |
| Ayckbourn, Alan (80) | Aymé, Marcel (1) | Azouz, Josh (4) |