James Jeffries Books

America'S Seal-Its End-Time Con

By James J, James, Jeffries, JEFFERIES, James J. Jefferies, James Jeffries

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The Book On Bookies: An Inside Look At A Successful Sports Gambling Operation

By Charles Oliver, James Jeffries

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If you have ever wondered why the bookie always wins and you always lose, or how your bookie adjusts point spreads and in which direction, The Book on Bookies is for you. In it, you'll find all the...

George Washington

By James Jeffries

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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.