David J. Greer Books

The Image/3000 Handbook

By Fred White, Robert M. Green, David J. Greer, Alfredo Rego, Dennis L. Heidner

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Wind In Your Sails: Vital Strategies That Accelerate Your Entrepreneurial Growth

By David J. Greer, Greer, David J.

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David Greer has a missionto take his thirty-five years of entrepreneurial experience and share it with other entrepreneurs to accelerate their success. Of all the things you as an entrepreneur can...

Wind In Your Sails

By David J. Greer

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The field of multilingual testing and assessment has grown rapidly in recent years due to the widespread need to integrate immigrant populations into mainstream education and to provide fair and eq...

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.