Title: Valley Of Fear (Unicorns Of Balinor #3)
First published: July 1, 1999
Description: Sunchaser, mightiest of the Royal Unicorns of Balinor, has regained his horn. Now, Sunchaser and Princess Arianna must set out on a dangerous quest for the Royal Diadem. Without it, there is no hope of finding Arianna's parents, the king and queen.