Greglon Lee Books

Dragon and the Tiger The Birth of Bruce Lee s Jeet Kune Do the Oakland Years

By Sid Campbell, Greglon Lee

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Dragon and the Tiger Volume 2 Bruce Lee The Oakland Years

By Sid Campbell, Greglon Lee

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Remembering the master

By Greglon Lee

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"Remembering the Master is a glimpse into the lives of Bruce Lee and James Yimm Lee, related through the memories of those closest to them during the Oakland years, where they changed the course of...

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.