Douglas Penick Books

The Age of Waiting

By Douglas J. Penick

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A Terrace in Rome

By Pascal Quignard, Charles Re, Douglas Penick

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Journey of the North Star

By Douglas J. Penick

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Journey of the North Star

By Douglas Penick

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The Oceans of Cruelty: Twenty-Five Tales of a Corpse-Spirit

By A Retelling By Douglas Penick

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One of the oldest books in the world, The Oceans of Cruelty is a sequence of twenty-five tales from India whose central theme is the dark power of storytelling. At the start, a young king falls int...

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.