Mark Perlman Books

Conceptual Flux

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How can one think about a thing, think something false about it, and still be thinking about that thing at all? If a concept is applied to something outside its meaning, how are we to say it does n...

Index of Economic Articles

By Mark Perlman, Drucilla Edwurzel, Naomi Perlman

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Index of Economic Articles Volumes 1978 Vol 15

By Mark Perlman

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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.