Gwyn Thomas Books

The sky of our lives: three novellas.

By Thomas Gwyn

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Tales from the Mabinogion

By Gwyn Thomas

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A retelling of the four books of the Mabinogion, a collection of Welsh medieval tales about the feats and exploits of legendary Welsh kings and princes.

The Tale of Taliesin

By Kevin Crossley Holland, Gwyn Thomas, Margaret Jones

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Y pethau diwethafa phethau eraill

By Gwyn Thomas

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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.