It is necessary to acquire a personalized ISBN number for reselling your book to wholesalers and distributors, which involves the assignment of unique ISBN numbers created into a bar code format for each book title. The bar code is broken up into 4 parts, giving the reseller the important information to track inventory, and find out the publisher identifier for re-orders. If you are serious about selling your books, this step is required for retailers to sell your book.
We can secure an ISBN number for you, however, our recommendation is for you to have full control of the rights to your number. Be careful not to order from a reseller of ISBN numbers, because you want to be sure that when the bar code is scanned that you come up as the owner, not the reseller of the barcode. ISBN/Barcodes come in groups of just one or of many, so researching what would be best for your needs is important. There are a lot of online companies who are not totally straight about what you are purchasing.