John Conroy Books

Sport Physical Education and Social Justice

By Andrew Parker, Nick J. Watson, Grant Jarvie

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Custodiam Reports or a Collection of Cases Relative to Outlawries and the Grants Thereon as Argued and Determined on the Revenue Sides of the Courts of Exchequer Both in England and Ireland

By John Conroy

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Tom Finch's Monkey and How He Dined with the Admiral

By John Conroy

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Belfast Diary

By John Conroy

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“For those puzzled by Northern Ireland, Belfast Diary offers a well-written, sympathetic and clear-eyed view” of life during the Troubles (New York Times Book Review)   In the late...

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.