in reply to Amazon's API

Does "good documentation on how to do this" mean you didn't find example code, specifications for the API, or something else?

If it's the first, the Monks will be better able (and willing) to assist if you spell out what you've done with the example code and how it fails to satisfy your requirements. If the second, I suspect Amazon would be a better place to ask for information; and if the third, perhaps you will update your post with some clarification.