Paul O Brien Books

Family

By Clyde Collard, Paul O Brien

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Asian

By Steve Brown, Paul O Brien

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The Ultimate CSS Reference

By Tommy Olssen, Paul O Brien

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Great decisions perfect timing

By Paul O Brien

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"Have you ever passed up something good in the hope that something perfect would come along? Or missed an exceptional opportunity because your timing was off? Is it hard for you to distinguish betw...

Blood Red Turns Dollar Green Volume 2

By Paul O Brien

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Slobberknocker Lib E

By Austin, Jim Ross, R C Bray, Scott E Williams, Vincent K McMahon, Paul O Brien

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Blood red turns dollar green

By Paul O Brien

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A shoot

By Paul O Brien

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Danno Garland has created his own empire in the world of professional wrestling, but when he finds his wife murdered in a small hotel room in Texas, none of that matters any more. Now he's out for...

The hurting circus

By Paul O Brien

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It's been twelve years since the New York wrestling territory was nearly burned to the ground. Twelve years since millions of dollars were lost because of a single bullet. Twelve years since Lenny...

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.