Martha Hanna Books

France went to war in 1914 not only in the trenches but also in the mind. When President Poincare called upon the intellectual elite to contribute to the war effort with "their pens and their words...

Walter Curtin

By Martha Hanna

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Evergon 1971 1987

By Evergon., Martha Hanna

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Calcutta

By Martha Hanna, Stephen Livick

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Suzy Lake

By Martha Hanna

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Orest Semchishen

By Martha Hanna

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Brian Wood

By Martha Hanna

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Eldon Garnet

By Martha Hanna

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Confluence

By Martha Hanna

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.