Gregory, David 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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Dinner with a perfect stranger

By Gregory David

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The Last Christian

By David Gregory, Gregory, David

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The last Christian

By Gregory David

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How'S Your Faith?: An Unlikely Spiritual Journey

By Gregory, David, David Gregory

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"Join former NBC newsman and Meet the Press moderator David Gregory as he probes various religious traditions to better understand his own faith and answer life's most important questions: who do w...

Dinner with a perfect stranger

By Gregory David

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Gregory monsieur flA te French Edition

By David Gregory

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Die letzte Christin

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Dinner with a Perfect Stranger

By Gregory David

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You are Invited to a Dinner with Jesus of NazarethThe mysterious envelope arrives on Nick Cominsky’s desk amid a stack of credit card applications and business-related junk mail. Although his seven...

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.