Cormac O Brien Books

Secret Lives of the U.S. Presidents

By Cormac O Brien

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Secret Lives of the U.S. Presidents

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Daily Disaster

By Cormac O Brien

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The forgotten history of America

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The rich and fertile subject of American history usually starts with the Declaration of Independence. However, select events in the 150 years between the landing of the Mayflower and 1776 changed t...

Outnumbered

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Forgotten History of America

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Secret Lives of the U.S. Presidents

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Secret Lives of the First Ladies

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Secret Lives of First Ladies

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Outnumbered

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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.