ISBN:

ISBN stands for International Standard Book Number. It is a unique numeric book identifier. All paperback books listed on Amazon have one.

ASIN:

ASIN stands for Amazon Standard Identification Numbers. It is a unique block of 10 letters and numbers that identifies items. All kindle books have an ASIN and it starts with "B0".

You can find your ISBN or ASIN for your book on your Amazon book listing page under "Product Details".

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