A
- Guy Adams: Sherlock Holmes: The Breath of God
- Boris Akunin: Jade Rosary Beads (crossover with Erast Fandorin)
- Poul Anderson: Time Patrol where the main character meets Sherlock Holmes and Dr. Watson during time travels.
- Val Andrews: famous music-hall artist, he authored about a dozen new Holmes stories, most of them with a magic/music-hall background.
- Isaac Asimov as editor with Martin H. Greenberg & Charles G Waugh: Sherlock Holmes Through Time and Space (anthology)
Read more about this topic: List Of Authors Of New Sherlock Holmes Stories