Knowles David Books

Saints and scholars

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Christian monasticism.

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The Middle Ages

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Christian monasticism.

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The third eye

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"Every summer, Jefferson, the narrator of The Third Eye, sublets a pristine Manhattan apartment to a new beautiful young woman. He spends the next two months hidden behind the boarded-up windows of...

The evolution of medieval thought

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Evolution of medieval thought

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Thomas Becket.

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Thomas Becket.

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The secrets of the camera obscura

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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.