Mark A. Green Books

Here Am I. Don t Send Me

By Mark A. Green

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Round We Dance

By Mark A. Green, Arwen Gwyneth

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Round We Dance

By Mark A. Green, Arwen Gwyneth

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Atheopaganism: An Earth-honoring Path Rooted in Science

By Mark Alexander Green

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Every human culture has evolved religious practices. Clearly, there is something inherent in humanity about religiosity: it must fulfill certain needs that evolved with us as our modern brains deve...

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.