Amazon affiliates

Why do they make it so difficult? Damn, I feel like I'm going through 25 screens to make one stupid item link. I'd like to just punch in the ISBN #'s from the back of all the books I'm referencing, and then be able to get all the codes at once. We're homeschoolers, we read and love a lot of books. I want to sell them through my kids history project blog and Amazon is making it so difficult. My next step is to try and do a wish list or a favorites list. I'll bet that's easier. Next time I have a spare 3 hours I'll try it (don't hold your breath, I haven't had a spare 3 hours since.... childbirth) I tried using their textlink program but it was hard.