Pretty easy one. First go to act 5. Find any section that has the arch-type structures that freeze you under them. All you have to do is find one of the bags laying on the ground that drop a book you read for experience near one of those. To get the EXP you have to be ELIGABLE for the exp first (meaning if you got the book I don't think it will give you anymore exp) and you have to keep clicking on the book while you are frozen. DO NOT CLICK the book if you are not frozen, if you do the book will disappear. I can't tell you how many times I've screwed this up by accidentally grabbing the book. Each time you click the book you will get the EXP.