Marjorie Jaffe Books

Get your back in shape

By Marjorie Jaffe

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Get your back in shape

By Marjorie Jaffe

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Albert the running bear's exercise book

By Barbara Isenberg

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A friend convinces Albert he can become a better runner by doing additional exercises. Outlines an exercise program with various levels of difficulty.

The Bathtub Yoga Relaxation Book

By Marjorie Jaffe, Barbara Isenberg

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The muscle memory method

By Marjorie Jaffe

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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.