Gareth F. Williams Books

Ffrindiau

By Gareth F. Williams

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Dial

By Gareth F Williams

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Mr Petras

By Gareth F. Williams

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Gwaed y gwanwyn

By Gareth F. Williams

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Nofel dditectif afaelgar yn llawn cyffro a thensiwn. Nofel swmpus ar gyfer oedran uwchradd - addas i fechgyn a merched. Un o chwe nofel dditectif a gyhoeddir gan CAA, wedi'u hysgrifennu gan awduron...

Cwmwl dros y Cwm

By Gareth F. Williams

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Y Gem

By Gareth F. Williams

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Nofel hanesyddol ar gyfer plant cynradd h n a phobol ifanc am ddau ffrind o Gymru a drodd yn ddau elyn ar gaeau pêl-droed eu hardal. Pan ddaeth y Rhyfel Mawr yn 1914, fe gymerodd un gêm bêl-droed a...

Y ddwy Lisa sgrech y dylluan

By Gareth F. Williams

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Y ddwy Lisa

By Gareth F. Williams

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Tacsi i hunllef

By Gareth F. Williams

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Y ty ger y traeth

By Gareth F. Williams

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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.