Casia Wiliam Books

Arthur yn achub y byd

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Aimed at 6+ year olds, here are two stories comprising colourful situations and characters which children will be able to identify with. "Dwy stori i'w clecio mewn un llyfr"--Clawr cefn = Back cover.

Sw Sara Mai

By Casia Wiliam, Gwen Millward

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Cadi a Jac a r Gath Fach Cadi and Jac and the Kitten

By Simon Taylor Kielty, Sam Taplin, Casia Wiliam

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Y Bysgodes

By Jac Jones, Casia Wiliam

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Sara Mai Ac Antur y Fferm

By Casia Wiliam, Gwen Millward

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Fish Princess

By Jac Jones, North Wales Africa Society, Casia Wiliam

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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.