Greg Williams Books

Tom is married with kids. After losing two jobs in as many years, he is now a full-time house-husband with the self-confidence of a mid-leap lemming. Sean, his twin brother, runs his own business,...

The accidental father

By Greg Williams

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Alex is bored by his job as the chief accountant at a small chain of travel agents, has a love/hate marriage and drinks more than he should. He and his wife Amanda, who's an estate agent, communica...

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.