Thomas De Wesselow Books

How did a first-century Jew called Jesus manage to spark a new religion? Christianity was born nearly two thousand years ago and has won untold millions of followers. Yet, historians still cannot s...

Easter Book

By Thomas De Wesselow

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The shroud of Turin and the secret of the Resurrection.

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The Sign

By Thomas De Wesselow

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Christianity was born nearly two thousand years ago in ancient Palestine. It has shaped the course of human history. Yet historians still cannot say how it really began. How did a first-century Jew...

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.