This article is from the Arthurian Booklist FAQ, by Cindy Tittle Moore email@example.com with numerous contributions by others.
Talbott, Hudson, King Arthur : The Sword in the Stone (New York :
Books of Wonder, 1991).
Tolstoy, Nikolai, The Coming of the King: A Novel of Merlin (Bantam
Books, 1989. Trade paperback.) Very closely based on the Welsh
mabinogion -- poetry rendered into prose. Makes no attempt at
"realism": the grotesquely fantastic has its day here. Lyrical
writing, worth reading. Long.
Treece, Henry, The Great Captains (New York: Random House, 1956.) This
is another sort of Celtic late Roman novel with characters such as
Artos the Bear/Artorius, dux bellorum, Bedwyr, Cie, Medrawt, and
Drostan. An excellent story, but not one for the squeamish.
Troughton, Joanna, Sir Gawain and the loathly damsel (retold and
illustrated by Joanna Troughton. 1st ed. New York : Dutton, 1972).
Adapted from an anonymous fifteenth-century poem, The Weddynge of Sir
Gawen and Dame Ragnell: in order to obtain the answer to a riddle that
will save King Arthur's life, Sir Gawain must marry the ugliest maiden
in the world. Juvenile.
Turner, Roy. King of the Lordless Country. London: Dennis Dobson,
Turton, Godfrey, The Emperor Arthur, (Garden City, N.Y., Doubleday,
1967). This is another late Roman historical reconstruction. Highly
Twain, Mark, A Connecticut Yankee in King Arthur's Court (many
Vansittart, Peter. Lancelot: A Novel. London: Peter Owen, 1978. Also
Perceval; London: Peter Owen, 1988.
Viney, Jane. The Bright-Helmed One. London: Robert Hale, 1975.
Voigt, Cynthia. The Wings of a Falcon (1993). This is the third book
in a series. In the first book, Jackaroo, Voigt looks at the Robin
Hood legend and writes a story about the truth behind it, that is,
what might actually have happened to inspire the oral tradition. The
Wings Of A Falcon works in much the same way. A major theme in this
series is just how much stories change in the telling, over time, and
some readers may be upset by just how much Voigt alters aspects of the
Arthurian legend that they've come to view as essential. Also, the
series so far is told in chronological order, with one or more main
characters in each book descended from some main characters in the
previous book, so in Voigt's series Robin Hood actually precedes
Arthur by four generations. Thoroughly enjoyable read, particularly if
you enjoy metafiction.
White, Terence Hanbury, The Once and Future King and The Book of
Merlin (Berkley Books, ISBNs: 0-425-06310-0 & 0-425-07282-7,
respectively. Original copyrights in 1939 and 1940). A retelling of
the legend from the earliest stories. More comedic than some of the
other versions. Be warned, The Book of Merlin was published in 1977,
13 years after T.H. White's death and it contradicts and rehashes many
themes and stories from TOFK.
White, T.H. The Sword in the Stone (orig. published in 1938). The
first book in TOFK. This is followed by The Witch in the Wood, The
Ill-Made Knight, and last The Candle in the Wind. All these together
comprise TOFK; the last was never published separately.
Whyte, Jack. Sky Stone, The Singing Sword, The Saxon Shore, and The
Eagle's Brood. Toronto: Penguin Books, 1992 and onwards. ISBN
0-14-017050-2 (first book). Very well written. One interesting theme
is the exploration of the reasons why Merlin is so reclusive.
Williams, Charles. War in Heaven. Grand Rapids: William B. Eerdmans,
1970 (First published in 1930).
Wolf, Joan, The Road to Avalon (Onyx Novels, a subdivision of Penguin
Books.) A romantic retelling, casting familiar characters into
startlingly different relationships.
Woolley, Persia, Child of the Northern Spring, Queen of the Summer
Stars, Guinevere: The Legend in Autumn (Poseidon Press, New York,
London, Toronto, etc.) The story of the life of Guinivere, from her
point of view.
Yolen, Jane, The Dragon's Boy (Harper and Row, New York, 1990).
Children's fiction. Young Arthur meets a dragon and comes to accept
him as a friend and mentor.
Yolen, Jane, Merlin's Booke: Thirteen Stories and Poems about the
Arch-Mage (Berkley Publishing Group, Ace Fantasy, New York, 1986).
Zelazny, Roger. The Courts of Chaos. 1978.
Zelazny, Roger. The Guns of Avalon. 1972.
Zelazny, Roger "The Last Defender of Camelot." In The Last Defender of
Camelot. New York: Pocket Books, 1980, pp. 271-94.