Mari George Books

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Nofel am Catrin yn cael ei bwlio ar dudalennau Facebook gan Jan. Ond pan mae Jan yn dangos llun arbennig i Catrin, mae'r ddwy'n dod o hyd i wybodaeth sy'n eu clymu am byth.

Cyfres Roli Poli

By Mari George, Petra Brown

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Academi Pel Droed

By Mari George, Tom Palmer

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Taro Nol

By Mari George, Tom Palmer

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Academi Pel Droed

By Brian Williamson, Mari George, Tom Palmer

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Pecyn Academi Pel Droed

By Brian Williamson, Mari George, Tom Palmer

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Amdani

By Hywel Griffith, Mari George

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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.