Harry Massey Books

Decoding the Human Body Field

By Peter H. Fraser, Harry Massey

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Decoding the Human Body Field

By Peter H. Fraser, Harry Massey, Joan Parisi Wilcox

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Choice Point

By David R. Hamilton, Harry Massey, Sasha Allenby

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Choice Point

By Harry Massey

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In the companion book to his film Choice Point, Harry Massey uses the insights of some of the world’s most creative thinkers and top achievers – to provide readers with practical strate...

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.