Martin Brennan Books

From the joy of early spring to the return of Jack Frost, a young girl and her grandfather tend a garden filled with plants and the host of creatures that make a home there.

13 coins

By Martin Brennan

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John Pozner always knew he was special; that his athletic abilities and fighting skills were far from human. But with a broken childhood, drug addictions, and a criminal record on his plate, he's a...

The hidden Maya

By Brennan Martin

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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.