Start with high-confidence arthurian fantasy books, then narrow by subgenre or adjacent topics.
The Crystal Cave
Unknown author
The Squire's Quest
Gerald Morris
The Wizard Knight
Gene Wolfe, Yves Meynard
Merlin's Harp
Anne Crompton, Anne Eliot Crompton
The King of Elfland's Daughter
Lord Dunsany
Arthurian Myths & Legends
J.K. Jackson, Prof Raluca Radulescu
