Os Guinness Books

The American Hour: A Time of Reckoning and the Once and Future Role of Faith

By Os Guinness

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Unspeakable: Facing Up to Evil in an Age of Genocide and Terror

By Os Guinness

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Unspeakable: Facing Up to the Challenge of Evil

By Os Guinness

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The Case for Civility: And Why Our Future Depends on It

By Os Guinness

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Long Journey Home: A Guide to Your Search for the Meaning of Life

By Os Guinness

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"In Time for Truth Os Guinness goes far beyond well-worn attacks on "political correctness." He shows how current assaults on truth - from the president down - have grave consequences for Western c...

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.