Gary E. R. Schwartz Books

The Afterlife Experiments

By Gary E. R. Schwartz

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The Living Energy Universe

By Paul Pearsall, Linda G. S. Russek, Dr. Linda G. S. Russek, Dr. Gary E. R. Schwartz, Gary E. Schwartz

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The Afterlife Codes

By Gary E. R. Schwartz, Susy Smith, Linda G. S. Russek

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The Heart's Code

By Paul P. Pearsall

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A fascinating synthesis of ancient wisdom, modern medicine, scientific research, and personal experiences that proves that the human heart, not the brain, holds the secrets that link body, mind, 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.