Books with title Belgarath the Sorcerer

Manu now lives in the castle with his new family. He is learning new things and enjoying his childhood. One day he starts to read a book, which, unknown to him, is a magical book. He is transported into a journey in a forest where he meets animals, birds and a dwarf. He realizes he has to save someone, but who? There is a sorcerer who has trapped this person. Can he get past the sorcerer to save this someone?