Phyllis Ann Karr is an author of fantasy, romances, mysteries, and non-fiction. She is best known for her "Frostflower and Thorn" series and Matter of Britain works.
A good reference book if you are looking for an encyclopedia compilation of all the people, places and objects of the King Arthur stories along with some maps and family trees.
Recommended as a good reference source if you are writing your own King Arthur story.