Don Gillmor Books

Harry Salter, a middle-aged man born into wealth but living with ballooning debt, is counting on his inheritance to rescue him financially and maybe even save his crumbling marriage, but when his f...

Long change

By Don Gillmor

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Long Change

By Don Gillmor

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Long Change examines the high-stakes world of oil through the life and loves of one man.Fleeing his violent, Pentecostal father, as well as a crime of his own, fifteen-year-old Ritt Devlin leaves T...

Long Change

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Don Gillmor's brilliant new novel, Long Change, examines the world of oil through the life and loves of one man; both stories are epic. Fleeing his violent, Pentecostal father, as well as a cri...

Sophie et le Monstre Sous le Lit

By Gillmor Martchenko

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Yuck a Love Story Nature All Around Series

By Don Gillmor

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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.