That's not bad, judging the fact that they have more marketing capabilities to reach customers you would not have dreamed of. Some of these distributors e.g. Unique Books and Quality Books distribute to only library markets while some specialize in bookstore sales. For a book published in Nigeria, the ISBN must begin with 978. For Japan, this digit is 4 and so on. The ISBN is a necessary step in making sure your book conforms to book publishing standards.
Content Call each chain store for information on their policy and submission requirements.
Acceptance by any of these stores carries with it some responsibilities. If the wholesaler is Bookazine, submit the same title to them indicating that your book has been submitted to Waldenbooks. On acceptance, Bookazine will send you a contract and possibly the first purchase order based on the fact that your book has been accepted by Waldenbooks. You have not finished. The above only may not sell a single copy of your book.