Anne McCaffrey 
An Exchange of Gifts [EPUB ebook] 

When Meanne, a princess of the realm, runs away from her father’s castle and an unwanted suitor, little does she realize the hardships and difficulties that lie ahead of her. Loneliness is the worst part — until she finds a fellow refugee, a boy named Wisp. Together they must make new lives for themselves. Yet they both have secrets — hidden pasts and magical powers that can tear them apart!