Hans Geybels Books

Adelmann of Liege and the eucharistic controversy

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"The present volume contains all the hitherto discovered writings by Adelmann of Liège: an extensive letter from Adelmann to Berengar (Berengar's response is also included), a fairly long letter to...

Kapellen in Vlaanderen

By Hans Geybels

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Kruis over de kerk

By Hans Geybels

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Cognitio Dei experimentalis

By Hans Geybels

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Cognitio Dei experimentalis

By Hans Geybels

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Humour and Religion

By Walter Van Herck, Hans Geybels

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Humour and Religion

By Hans Geybels, Van Walter Herck

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Humour and Religion

By Walter Van Herck, Hans Geybels

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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.