Assassin's Apprentice: Oathbreaker

A murderer shoves a prince to his "death."
An assassin legally kidnaps a terrified boy.
A ruling lord orders an atrocity so devastating it will change the course of history.
So begins this highly original and engaging epic fantasy, a story of love, family trust, sworn promises and hard-earned friendships, in which two boys must put aside their childhood understanding of the world and accept their own incredible power to do right.