Jeffrey Dean Books

One-Liner Wisdom for Today's Guys

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What Do You Call Cheese that Isn’t Yours? One-liners. The jokes are known for little more than eliciting a groan or two from you. But since Jeffery Dean came up with this handy booklet for t...

This Is Me

By Jeffrey Dean

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You want to show the world the real you. But sometimes you’re not sure who the real you really is. (Here’s help.)Being a teen girl isn’t easy. The pressures, the frustrations, t...

The Fight of Your Life

By Jeffrey Dean

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Christian parents today feel replaced as the primary influence in their teen’s lives--undermined at school, invaded by the web, and in the dark about what’s really going on. Truth is,...

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.