There are 2 series with the name: Avalon
Avalon Books in Order
Books by Marion Zimmer Bradley and Others1. The Mists of Avalon: A Novel (2000)
2. The Forest House (1994)
3. Lady of Avalon (1997)
4. Priestess of Avalon (2000)
6. Marion Zimmer Bradley's Ravens of Avalon (2007)
7. Marion Zimmer Bradley's Sword of Avalon (2009)
Daughters of Avalon Books in Order
Books by Tanya Anne Cros and Others1. The King's Favorite (2019)
2. A Winter's Rose (2019)
3. Fire Song (2019)
4. Lord of Shadows (2020)