Greg Critser Books

Skinny Rules

By Bob Harper, Greg Critser

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Skinny habits

By Bob Harper

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"Bob Harper lets us in on the secret behaviors of people who not only lose weight but keep the pounds off for good--and make it look easy. In Bob Harper's #1 New York Times bestselling book The Sk...

California National Geographic Traveler

By Christopher Baker, Greg Critser

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Skinny Rules

By Bob Harper, Greg Critser

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National Geographic Traveler: California, 5th Edition

By Greg Critser

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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.