Patrick O Leary Books

Door number three

By Patrick O Leary

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Regency editor

By Patrick O Leary

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Sir James Mackintosh, the Whig Cicero

By Patrick O Leary

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ix, 226 p. : 24 cm

Servants of the empire

By Patrick O Leary

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"Punjab, 'the pride of British India, ' attracted the cream of the Indian Civil Service, many of the most influential of whom were Irish. Some of these men, along with Irish viceroys, were inspired...

The impossible bird

By Patrick O Leary

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The gift

By Patrick O Leary

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The Black Heart hc

By Patrick O Leary

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The Black Heart signed tc

By Patrick O Leary

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Gift

By Patrick O Leary

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The Impossible Bird

By Patrick O Leary

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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.