Cathy Porter Books

Plays 2

By Cathy Porter, Maksim Gor Kij

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Snapshots

By Cathy Porter, Norma Klein

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The lives of thirteen-year-old Sean, preparing for his bar mitzvah, his friend Marc, and their families are disrupted when the boys' interest in photography involves them in the district attorney's...

Alexandra Kollontai

By Cathy Porter

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Larissa Reisner Pioneers

By Cathy Porter

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A Great Love

By Cathy Porter, Alexandra Kollontai

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Kremlin Wives

By Cathy Porter, Larisa Nikolaevna Vasil Eva

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The Russian Writers Drawing Book

By Cathy Porter

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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.