Check out these links at Amazon Diana.
http://www.amazon.com/exec/obidos/subst/partners/direct/advantage-for-books.html/
http://www.amazon.com/exec/obidos/subst/partners/publishers/publishers.html/
There is a lot of info so look around.
Amazon does require an ISBN number. If you do not have one visit
http://www.isbn.org
Specifically:
US -
http://www.isbn.org/standards/home/isbn/us/index.html
Other-
http://www.isbn.org/standards/home/isbn/international/
That site is run by
http://www.Bowker.com
I recommend all my readers visit that site. They're big and they have a lot of links and info about publishing.
Regards,
Bob Geraci Jr.
http://www.moneymakngebooks.com