Ashling is the third book in the Obernewtyn chronicles.
It was published in 1995.
The powerful farseeker Elspeth Gordie is sent to Sutrium, seat of the council that rules the Land, to seal an alliance between the secret Misfit community at Obernewtyn and rebel forces. The journey takes her far beyond the borders of the Land, across the sea and into the heart of the mysterious desert region of Sador, where she seeks help to destroy the weaponmachines. But before her dark quest can begin, Elspeth must learn the truth of her dreams: she must understand why the Beforetimers destroyed their world.