The Complete Lyonesse

The Elder Isles - an ancient land where chivalry and the realm of fairie exist side by side. A land of mystery, strange beauty, high adventure and arcane magic. Kings are at war, opposing magicians devise ever more cunning stratagems. It is a land where princesses and changelings both can become embroiled in political rivalries and the quest for the grail.

Jack Vance's Complete Lyonesse is a perfect addition to the series, contains Suldrun's Garden, The Green Pearl, and Madouc (the novel for which Vance won the World Fantasy Award).