Heini Gruffudd Books

Welsh Personal Names

By Heini Gruffudd

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Beginner's Welsh

By Heini Gruffudd

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Welsh-English English-Welsh dictionary & phrasebook

By Heini Gruffudd

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Beginner s Welsh

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Beginner s Welsh

By Heini Gruffudd

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"Welsh is a Celtic language of the British Isles, spoken primarily in Wales. It has been spoken there for over sixteen hundred years, and Old Welsh was used throughout Britain before the Norman Con...

The Welsh learner's dictionary

By Heini Gruffudd

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Real Wales

By Heini Gruffudd

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Cyfle I Siarad

By Heini Gruffudd

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Welsh talk

By Heini Gruffudd

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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.