Douglas J. Schulz Books

Brokerage Fraud

By Douglas J. Schulz, Tracy Pride Stoneman

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Just when you thought it was safe

By Douglas J. Schulz

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"Just When You Thought It Was Safe will take you on a thrill ride of emotions and at times, cries for relief as America is invaded by illegal immigrants all wanting to take advantage of the Preside...

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.