John A. Nolan Books

Confidential: Uncover Your Competitors' Top Business Secrets Legally And Quickly--And Protect Your Own

By John NOLAN, John A. Nolan, John Nolan

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Corporate espionage has become, more than ever, a fact of life. Companies such as Microsoft, GE, & Procter & Gamble have entered the playing field in a big way, recruiting & training people to beco...

Why The Church Abandoned The Starving Irish

By John A. Nolan

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Me, My Dad And God: Versus 'Revealed' Religions

By John NOLAN, John A. Nolan

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Me, My Dad And God: Versus 'Revealed' Religions

By John A. Nolan

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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.