Robert Harley Books

The Impartial secret history of Arlus, Fortunatus, and Odolphus

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Strength and Fitness Training for Basketball

By Rob Harley, National Coaching Foundation, Jo Doust

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Wires above South East London

By Robert J. Harley

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The Absolute Sound's Illustrated History of High-End Audio

By Robert Harley

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The Absolute Sound's Illustrated History of High-End Audio documents the history of the high-end audio industry in a series of three graphic-rich coffee-table books. Volume One: Loudspeakers presen...

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.