Fred Janssen Books

Marketing Sucks and Sales Too

By Tom Marx, Fred Janssen, Tom Herndon

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Lang leve de TV

By Fred Janssen

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Leuk quiz- en belevingsboek over 60 jaar televisie, een trip die begint bij de wonderjaren van de televisie en duurt tot vandaag. Herbeleef je favoriete programma's, van de 'Wies Andersen Show' en...

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.