John Gilmore Books

Reunion of Souls

By John W. Gilmore

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Swinging in Paradise

By Gilmore John

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First edition, First printing.

Who's Who of Jazz in Montreal

By Gilmore John

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Biographies of more than 200 professional musicians and bands that lived and worked in Montreal, from the ragtime era to 1970. Includes American and European musicians in exile, as well as Montre...

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.