Patrick O'Mara Books

The Autobiography Of A Liverpool Irish Slummy

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[by] Pat O'mara.

Laying Down The Law, 11th Edition

By DAVID HAMER, Patrick O'Mara, Belinda Smith, Robin Creyke, Tristan S. Taylor, R CREYKE; D HAMER; P O?MARA; B SMITH; T TAYLOR

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Laying Down the Law provides a comprehensive and accessible introduction to the study of law. Essential foundation topics covered include Australia’s legal system and sources of law while discussio...

Developing The Talented Public Speaker In You

By Patrick, Patrick O'Mara, Oandapos;Mara

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An Hour With Jesus

By Patrick, Patrick O'Mara, O'Mara

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Another Hour With Jesus

By Patrick O'Mara

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An Hour With The Sacred Heart

By Patrick O'Mara

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Another Hour With The Sacred Heart

By Patrick O'Mara

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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.