If you're considering picking up a copy of Derek's Gold Mastery Guide, you might want to check out this review of it first and see if it's the right gold making guide for you.
Review Derek's Gold Mastery Guide Here
If you're looking for strategy guides that will help you level faster or earn more gold in World of Warcraft without spending all of your time grinding, then my WoW Guide Reviews will be able to help you pick the right guides for you.