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 The Gollancz Black Books have proved to be an immensely successful formula for getting well loved stories into the hands of people who also love well made books. Jack Vance's Complete Lyonesse is a perfect addition to the series and contains Madouc the novel for which Vance won the World Fantasy Award.