The Shadow Stone

Accosted by bullies on a forest trail, Aeron had no way of knowing that the confrontation would change his life forever. Accused of a crime for which he bears no blame, he is pursued deep into the forests of the Maerchwood. First rescued, and then tutored, by the mysterious Storm Walker, he discovers a previously undreamed-of talent for magic, and his life is swept up in the study of the arcane arts...

...until the very principles of magic, and indeed the future of Faerûn, come under attack from the unspeakably evil influences of... The Shadow Stone.