The Wishsong of Shannara
link
summary
In a world of elves, gnomes and trolls, a dark force has come to threaten the Four Lands. The Ildatch, an ancient book of unspeakable power, has been awakened, unleashing its vile, deathly magic upon the land, creating unnatural creatures and causing horrific destruction. The only hope for survival lies with siblings Jair and Brin Ohmsford, descendants of the legendary hero, Shea. Together with their friend Rone Leah, they must embark on a perilous journey to the very heart of evil, armed solely with the power of the Wishsong - a magic that has the power to create as well as destroy. But can they save their world before it's too late? Join Jair, Brin and Rone as they face off against the armies of darkness, wielding their magic in a magnificent battle of good against evil.