Patrick O'Leary Books

Door number three

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...

Lessons from the Japanese masters

By Fred Neff

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Examines the history and philosophy of Japanese martial arts and gives instruction in a variety of related self-defense techniques.

Lessons from the fighting commandos

By Fred Neff

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Lessons from the Eastern warriors

By Fred Neff

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Examines the history and philosophy of the Eastern martial arts such as jujitsu and karate and suggests self-defense techniques and strategies drawn from these disciplines.

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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The Best of Electric Velocipede

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Huter der Nacht.

By Patrick OLeary

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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.