It's a series of books. The first is Pawn of Prophecy. After the Belgariad there's the Mallorean, a sequel-series. And after that there's Belgarath the Sorcerer and Polgara the Sorceress.
I have read them all.
Anyway, you know you're addicted when you spend two hours on the incredibly slow school computers, which used to be fairly fast until yesterday, on the 'downs, despite the fact that due to the slowness of the computers you don't even have time to post anything. (I swear it took 5-10 minutes to load a page!)