The Complete Arrows Trilogy (Heralds of Valdemar)

Together for the first time in a single volume, The Complete Arrows Trilogy is the adventure that launched Valdemar, Mercedes Lackey's expansive fantasy realm beloved by generations of readers.

Talia, once a runaway, is Chosen by the Companion Rolan, a mystical horse-like being with powers beyond imagining. She becomes one of the great Heralds of Valdemar, a protector of the realm, and a member of the Queen's Own elite guard.
 
Over the course of Talia's adventures, she struggles to master her unique magical abilities, while protecting her queen, the heir to the throne, and the kingdom itself. She battles against diabolical magic, treacherous assassination plots, dangerous unrest, and traitors to her fellow Heralds.