Ring of Allaire — Susan Dexter

QUEST FOR THE SLEEPING PRINCESS

Master magician Blais was dead, murdered by the evil ice-lord Nimir. Now there was only Tristan, an ill-trained apprentice, to carry on the quest to rescue Allaire, a princess held in enchanted sleep in Nimir's frozen halls. Though a thousand master mages had already failed in the quest, Tristan must succeed -- or all of Calandra would be doomed by Nimir's greed.

First Tristan would have to find the wonder-horse Valadan, who had vanished long ago. Then he had to secure the aid of the one knight among many who was a true Heir to the Throne. Together, they must overcome the Guardian dragon of Nimir's realm.

After that -- well, there was still the tenth ring to be found, since Allaire was powerless without it.

Nothing, of course, was ever that simple. There were complications...