The listing, Three Against The Witch World by Andre Norton has ended.
This is a paperback book in very good condition.
Never before in all of Estcarp had there been three like them--Kyllan, Kemoc, and Kaththea--not three but one, linked by strange forces. They were the forbidden offspring of a witch mother and a man of war from another world, and as such they inherited unprecedented powers from their parents--and the curse of outcasts from the Witch World.
That was, until the Witches needed Kaththea's gifts to bolster their own fading strength, and seized her for their own. But three were one, and Kyllan and Kemoc could not relinquish what was a part of them. So they determined to rescue their sister, and flee with her--but how? and where? Could anyone escape the terrible wrath and matchless powers of the Witches? They were young, unique, untried; they were three against the Witch World.