Sid Campbell Books

Self Defense for Wimps Yuppie Survival Guide of the 1990 s

By Sid Campbell

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Renzoku Ken Okinawan Toudi Jitsu

By Sid Campbell

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Remembering The Master: Bruce Lee, James Yimm Lee, And The Creation Of Jeet Kune Do

By Sid Campbell, Greglon Lee, Greglon Yimm Lee

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Together, Bruce Lee and his comrade, friend, and mentor James Yimm Lee changed the world of martial arts forever. During the period known to martial arts aficionados as the Oakland Years (1962-1965...

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.