Lady of the Trillium — Marion Zimmer Bradley

Torn between love and duty, a reluctant young acolyte will be called on to magically save her imperiled world in this enthralling chapter of the Saga of the Trillium

Of the three royal siblings who made up the Petals of the Living Trillium, only Lady Haramis survives nine hundred years after the events that nearly devastated their realm. But the Archimage is old and ill, and a successor must be found if Ruwenda is to remain safe and protected. In Princess Mikayla, Haramis recognizes the ideal candidate. However, the impulsive teenager must be carefully schooled in the magic arts -- and the headstrong youth isn't certain she even wants the responsibility, especially if it means abandoning her one true love. But time is running out -- for Haramis and for the kingdom. And with disaster looming, the fate of Mikayla's endangered homeland may soon fall heavily on the shoulders of a young, only half-trained rebel, ready or not.
 
Revisiting the magnificent world she created with fellow fantasy luminaries Julian May and Andre Norton in Black Trillium, the remarkable Marion Zimmer Bradley joins coauthor Elisabeth Waters to gaze into the far future of the World of the Three Moons. Lady of the Trillium is an enthralling, unforgettable tale of destiny, duty, magic, love, and the seemingly unbridgeable chasm between old and young.