Dr. Norman Lamm Books

The Shema

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The Shema has been described as the "central watchword" of Jewish faith. For centuries, Jews have pronounced this single sentence affirming God's unity as their final words before dying; they have...

The Shema: Spirituality And Law In Judaism

By Norman Lamm, Dr. Norman Lamm, Lamm, Dr. Norman

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The Sema has been described as the central watchword of Jewish faith. For centuries, Jews have pronounced this single sentence affirming God's unity as their final words before dying, as well as be...

Faith Doubt

By Norman Lamm

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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.