Ethan Persoff Books

John Wilcock

By Ethan Persoff

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The Realist cartoons

By Ethan Persoff, Paul Krassner

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"A collection of the comics Time magazine called the Charlie Hebdo of the 1960s. The Realist was a legendary satirical periodical that ran from 1958 to 2001 and published some of the most incendiar...

Radio Wire Book One

By Ethan Persoff

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Pogostick 1

By Al Columbia, Ethan Persoff

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Pogostick 2

By Al Columbia, Ethan Persoff

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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.