Jacob Teitelbaum Books

The nation’s leading expert on chronic fatigue and fibromyalgia offers a practical and concise guide to restoring health and energy.Millions of Americans have turned to Dr. Jacob Teitelb...

From Fatigued to Fantastic!

By Jacob Teitelbaum

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Now in a newly revised edition for 2020!“Dr. Teitelbaum has updated his pioneering and groundbreaking book From Fatigued to Fantastic, and this classical volume is a must-read for anyone suff...

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.