Not everyone who buys from Disc Makers needs post production. Some artists do post production with an outside mastering studio. Other clients are quite happy with the quality of the master they get from the recording studio and want that exact sound on their cassettes and CDs. We have found, however, that most masters would benefit from post production. Manufacturers and retailers don't refer to audio books by title, but by release number.
Every project needs a release number since retailers keep their inventories that way.
It also helps the manufacturer keep all your parts straight, since it gets printed on inserts and marked on audio masters and other parts. At Disc Makers, we also keep our computer records this way. In short, a release number is essential. If you do not indicate a release number on your order form, we will assign one to your project. Registering your work with the Library of Congress will not prevent someone from infringing on your work, but it will allow you to take legal action against them.