Dr. Cathy Burns Books

Masonic & Occult Symbols Illustrated

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First Printing: 1998 - Discover the most fascinating and in-depth meanings behind the symbols used by the Masons, occultists, witches, New Agers, Satanists, and others. This book uncovers the hidde...

Billy Graham And His Friends: A Hidden Agenda?

By Cathy Burns, Dr. Cathy Burns

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In this most fascinating and extremely well-documented book, you will discover some little known facts about one of the most well-known men of the 20th century Billy Grahamas well as several of his...

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.