Charles Eldridge Books

The Second Battle Of Hastings

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How the German invasion of England in 1940 might have started.

Tales From The Bear Cult

By Bob Vickery, Bob Condron, John Coriolan, Ron Suresha, Shaun Levin, Simon Sheppard, Jay Neal, Charles Eldridge, Jack Fritscher, Mark Hemry

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Masculine adventure stories meet men's love stories. Hand-picked by a dozen magazine editors from Bear , Classic Bear , American Bear , American Grizzly , Drummer , Men , Indulge , Hippie Dick , an...

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.