Jean Guy Rens Books

The Invisible Empire

By Kathe Roth, Jean Guy Rens

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Empire invisible

By Jean Guy Rens

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L' empire invisible

By Jean Guy Rens

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Le cybercommerce au Quebec

By Jean Guy Rens

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Vlady

By Jean Guy Rens

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Major biographic and critical study of artist Vlady (b. Russia 1920, immigrated to Mexico - d. 2005), that includes his own writings and texts by fellow artists and art historians such as Régis Deb...

Vlady

By Jean Guy Rens

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Invisible Empire

By Jean Guy Rens

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Cybersecurite Au Quebec

By Huguette Guilhaumon, Jean Guy Rens

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Explosion des Telecommunications 1956 2016

By Jean Guy Rens

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Cybersecurity in Canada

By Huguette Guilhaumon, Jean Guy Rens

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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.