Where to Purchase an ISBN if Located in the US

Independent publishers and authors in the US are responsible for acquiring ISBNs for their books by purchasing them from Bowker, the US ISBN Agency (www.myidentifiers.com). Bowker sells a single ISBN for $125, 10 ISBNs for $295, or 100 ISBNs for $575; therefore, it’s always advisable to purchase ISBNs in bulk, unless you are certain that you will use only one to three ISBNs for the entirety of your publishing career. 

Be sure to use the same ISBN for your book in all sales channels. Listing the same book with different ISBNs on multiple distributors may confuse retailers and consumers trying to purchase your book.

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