Esther Kustanowitz Books

The Hidden Children Of The Holocaust: Teens Who Hid From The Nazis

By Esther Kustanowitz

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It Takes A Dream: The Story Of Hadassah

By Esther Kustanowitz, Marlin Levin

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Spanning two centuries, reaching virtually every corner of the globe, the epic story of the Hadassah organization is the inspiring and fascinating history of generations of determined women who wor...

The hidden children of the Holocaust

By Esther Kustanowitz

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In their own words, details the experiences of Jewish teenagers hiding from the Nazis.

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.