Peter Hellman Books

When Courage Was Stronger Than Fear

By Peter Hellman

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When courage was stronger than fear

By Peter Hellman

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"More than twenty-five years ago, in Avenue of the Righteous, the original edition of this book, Peter Hellman wrote one of the first accounts of men and women who succeeded in saving Jews from the...

When Courage Was Stronger Than Fear

By Peter Hellman

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In vino duplicitas

By Peter Hellman

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Nobody can know them all, certainly not Rudy Kurniawan, who never set eyes on Burgundy. In the end, it was his imprecise knowledge of a particular domaine's history that tripped him up. It happened...

In Vino Duplicitas Lib E

By Charles Constant, Peter Hellman

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In Vino Duplicitas

By Peter Hellman

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L' album d'Auschwitz d'apr es un album decouvert par Lili Meier, survivante du camp de concentration

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Etsim ba sederah

By Peter Hellman

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Shaping the Skyline

By Peter Hellman

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Shaping the Skyline

By Peter Hellman

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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.