Jack Vance 
Green Pearl [EPUB ebook] 
Lyonesse Book 2

The Lyonesse sequence evokes the Elder Isles, is a baroque land of pre-Arthurian myth now lost beneath the Atlantic, where powerful sorcerers, aloof faeries, stalwart champions, and nobles eccentric, magnanimous, and cruel pursue intrigue among their separate worlds . . .King Aillas of Troicinet defends the peace of the Elder Isles against both the Ska marauders who once enslaved him and the wicked King Casmir. While organizing the unruly barons in the frontiers of his land, Aillas goes out of his way to capture the lovely Ska noblewoman who once stung him with her disregard. When he gets separated from his men, his dream of forcing the lady’s recognition becomes the toil of dragging a defiant captive across lands governed by Casmir’s henchmen. Meanwhile, the world of magic has gone on the move. The concentrated malice of the witch Desm i has manifested as a green pearl, breeding lust and envy and death; and a sorcerer in Casmir’s employ abducts the princess Glyneth, in a bid to draw Aillas and friends on a hopeless rescue mission across a bizarre and deadly alternate world . . .(First published in 1985)