Evangeline Walton

The Island of the Mighty, first printing July 1970, cover art by Bob Pepper:

The Children of Llyr, first printing August 1971, cover art by David McCall Johnston:

The Song of Rhiannon, first printing August 1972, cover art by David McCall Johnston:

The Prince of Annwn, first printing November 1974, cover art by David McCall Johnston. [Not technically a part of the Ballantine Adult Fantasy series, which ended with the last title released in April 1974.]:

For a look at the covers on other Ballantine printings of these books, see my post on "Evangeline Walton in the Ballantine Adult Fantasy Series."