Erik Gregersen Books

Explores the foundations and laws of both thermodynamics and mechanics as well as the lives of those individuals who helped advance these fundamental areas of physics.

The Britannica guide to the atom

By Erik Gregersen

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Asteroids Meteors Meteorites and Comets

By Nicholas Faulkner, Erik Gregersen

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Universe

By Erik Gregersen, Britannica Educational Publishing

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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.