Jonathan Keyes Books

Guide To Natural Health: Using The Horoscope As A Key To Ancient Healing Practices

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Guide to Natural Health Discover Four Element MedicineHolistic Healing Rooted in Astrology and the Natural World Guide to Natural Health merges astrological, shamanic, pagan, and healing concepts i...

Civilization Under Attack : September 11, 2001 & Beyond

By Jonathan Keyes, Kris Brandt Riske, Bernie Ashman, David Crook, Stephanie Jean Clement, Georgia Anna Stathis, Robert Hand, Stephanie J. Clement, Clement, Stephanie J., Ashman, Bernie, Crook, David, Hand, Robert, Keyes, Jonathan, Riske, Kris Brandt, Stathis, Georgia Anna

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Making Sense of the Events That Changed Our WorldOn September 11, 2001, our world was forever changed. While the questions are many, the answers are few. Civilization Under Attack seeks to provide...

Bridging Decisions Into Solutions

By Jonathan Keyes, Richard D. St. Clair, Robert Davis Gray, Jonathan Keyes, Richard D. St. Clair, Robert Davis Gray

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Human Health : The Natural Way

By Jonathan Keyes

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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.