Erik Peterson Books

Big Fun & Easy Bible Cross Words

By Erik Peterson

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Theologie und Theologen

By Erik Peterson

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Theological tractates

By Erik Peterson

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The essays in "Theological Tractates" were published between 1925 and 1937, during which time Erik Peterson converted from Protestantism to Roman Catholicism. They deal with a range of theological...

Thinking Beyond Coding

By Erik Peterson

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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.