David Gregory Books

Marvelous Exchange : Discovering the Power of Spiritual Union with Christ, an Exposition of Romans 6

By David Gregory, Dick Flaten

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Messy Church Does Science

By David Gregory

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The Rest of the Gospel: When the Partial Gospel Has Worn You Out

By David Gregory, Dan Stone

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“Do I have life ‘more abundant’?” That’s a question millions of Christians have asked down through the ages. Dan Stone asked that question during a time of spiritual frustration in his own life a...

Dinner with a Perfect Stranger

By David Gregory

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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...

A Day with a Perfect Stranger

By David Gregory

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What if a fascinating stranger knew you better than you know yourself?When her husband comes home with a farfetched story about eating dinner with someone he believes to be Jesus, Mattie Cominsky t...

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.