David Gregory Books

The Last Christian

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In the future, it’s possible to live forever—but at what cost? A.D. 2088. Christian missionary Abigail Caldwell emerges from the jungle for the first time in her thirty-four years, the sole sur...

Dinner with a Perfect Stranger: An Invitation Worth Considering

By David Gregory, Gregory David

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Strategic Solutions in 60 Minutes

By David Gregory

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Christmas at Sibyl s

By David Johnson

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Dinner with a perfect stranger

By Gregory David

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The Chappell Recorder Book. The Simple Way to Play

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Mendocino

By Gregory David

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The Last Christian

By David Gregory, Gregory, David

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Dinner with a Perfect Stranger

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Mendocino

By Gregory David

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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.