In this scenario, renegade wizards have fled to the Vale of the Mage, and the player characters are sent across the Barrier Peaks after them; if the characters make it to the Vale, they must try to persuade its master, the Black One, to help them against the renegades. ~ 64 pages, plus poster map.
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Used availability for Jean Rabe's Vale of the Mage
February 1990 : USA Paperback