The Chronicles of Mavin Manyshaped Series by Sheri S. Tepper

When recklessly headstrong Mavin Manyshaped learns to control her Talent for changing into any shape, she begins to fulfill her destiny as the most notorious shape-shifter in all the lands of the True Game

There were seven cities in the Chasm. built to cling to the great cliff wall, woven into the massive roots of the flattrees! Once there had been eight cities - but the eighth had disappeared one night, fallen into the chaem's mysterious depths. No one hadever ventured to the bottom of the chasm. No one had dared, in spite of tales of the lost city's treasure. Until the bird-woman Mavin came like a messenger of heaven to lead the people of the chasm on a fabolous, dangerous quest.

Mavin the shape-shifter and Himaggery the wizard made a vow. When twenty years had come and gone in the lands of the True Game, they would meet again. But Himaggery has vanished into the wilds, chasing fairy tales and dreams, leaving only a letter of love behind for Mavin to find. If he were dead, she would know it. If he were simply dead, sorcerers could trace the scent of his trail, necromancers could raise his bones from the dust... moreMavin the shape-shifter and Himaggery the wizard made a vow. When twenty years had come and gone in the lands of the True Game, they would meet again. But Himaggery has vanished into the wilds, chasing fairy tales and dreams, leaving only a letter of love behind for Mavin to find. If he were dead, she would know it. If he were simply dead, sorcerers could trace the scent of his trail, necromancers could raise his bones from the dust. But he has disappeared without a trace, beyond the power of wizardry. And so the search of Mavin Manyshaped begins... less