Grant R. Jeffrey Books

The Handwriting of God

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The Handwriting of God will answer your questions about the phenomenal Bible Codes while revealing awesome New Code Discoveries hidden in the Scriptures. Can we trust the Bible? Is Christianity cre...

Armageddon

By Grant R. Jeffrey

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As the world rushed toward the new millennium, many were asking:·Is the Year 2000 significant in the plan of God?·Are we the generation that will see the return of Christ?·Will Israe...

Jesus

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The Signature of God the Truth About the Bible Codes Executive Edition

By Grant R. Jeffrey

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The Signature of God Executive Edition

By Grant R. Jeffrey

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Millennium Meltdown

By Grant R. Jeffrey

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Jesus the great debate

By Grant R. Jeffrey

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Journey into eternity

By Grant R. Jeffrey

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Surveillance Society

By Grant R. Jeffrey

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Grant Jeffrey’s new prophecy book Surveillance Society examines the fascinating predictions that are setting the stage for the rise of the Antichrist and world government in the last days. Ne...

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.