Charles Herve Gruyer Books

“Farmers like Charles and Perrine Hervé-Gruyer [are] beacons of light. Their work allows the rest of the world to see that there is another life, there is another way.”—Eli...

Living with the Earth, Volume 1

By Charles Herve Gruyer

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In 2006, Perrine and Charles Hervé-Gruyer set out on a mission to discover a new form of agriculture that provides organic crops and creates meaningful employment in the local community. Usi...

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.