Christopher Petkanas Books

Parish-Hadley: Sixty Years of American Design

By Christopher Petkanas, Parish Henry II Mrs., Albert Hadley

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At home in France

By Christopher Petkanas

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At home in France

By Christopher Petkanas

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Loulou Yves

By Christopher Petkanas

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"Dauntless 'in the bone style' made Loulou de La Falaise one of the great fashion firebrands of the twentieth century. Descending in a direct line from Coco Chanel and Elsa Schiaparelli, she was ce...

At Home In France

By Christopher Petkanas

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Loulou and Yves

By Christopher Petkanas

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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.