Freddy Derwahl Books

The last monk of Tibhirine

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"The Last Monk of Tibhirine is the story of the Cirstercian monk Jean-Pierre Schumacher, the last surviving member of a monastic community which was kidnapped and killed in Algeria in 1996"--

Le Dernier Moine de Tibhirine A.M. GD FORMAT French Edition

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Aachen Kaleidoskop

By Hermann Weisweiler, Freddy Derwahl

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Kirchen und Kapellen in Ostbelgien

By Freddy Derwahl

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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.