David E. Gumpert Books

"Do Americans have the right to privately obtain the foods of our choice from farmers, neighbors, and local producers, in the same way our grandparents and great grandparents used to do?Yes, say a...

How to really create a successful marketing plan

By David E Gumpert, Jeanne Zimmerman

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How to Really Create a Successful Business Plan

By David E. Gumpert

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How to Really Create a Successful Marketing Plan

By David E. Gumpert

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How to really start your own business

By David E. Gumpert

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Starting your own business represents the biggest risk and the greatest opportunity of your life. Now you can get step-by-step guidance and real-life advice in Inc.'s How to Really Start Your Own B...

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.