In a nutshell:
Here is how to get your book, CD, or DVD listed on the long tail of Amazon:
1 Get an ISBN (for a book), or a UPC (for a CD or DVD). For one book it costs $125, for one CD, $55, for one DVD, $89.
2 Get a bar code based on the ISBN or UPC. Costs $10, or may be included in UPC.
3 Sign up with Amazon, $30 per year.
4 Duplicate your stuff; include the bar code on the outside.
5 Ship two copies to Amazon
6 Send cover scan
7 Track sales
Complete article Here