Penny Allen Books

The Living Unknown Soldier

By Jean Yves Le Naour

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The living unknown soldier

By Jean Yves Le Naour

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"A Geography of Saints is an exhilarating, deeply moving, and clear-eyed account of the author's first year caretaking a horse ranch outside Saints, Oregon. In the depths of the Reagan recession, A...

The Face of the Deep

By Penny Allen

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Metaphors for Change

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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.