Patrick Healy Books

The Nation's cities, change and challenge

By Patrick Healy

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Virgil Grotfeldt

By Patrick Healy

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Jacobus Kloppenburg

By Patrick Healy, Waldo Bien

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CHRONICLE OF HUGH OF FLAVIGNY: REFORM AND THE INVESTITURE CONTEST IN THE LATE ELEVENTH CENTURY.

By PATRICK HEALY

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Gold Tooled Bookbindings Commissioned by Trinity College Dublin in the Eighteenth Century Studies in Irish Bookbindings 1

By Patrick Healy

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Rathfarnham Roads

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A study of Rathfarnham - the development and history of Rathfarnham village in South Dublin

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.