Michael J. Gelb Books

NATIONAL BESTSELLER • Uncover your own hidden abilities, sharpen your senses, and liberate your unique intelligence by following the example of the greatest genius of all time, Leonardo da Vinci. “...

The How to Think Like Leonardo da Vinci Workbook

By Michael J. Gelb

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Leonardo Da Vinci Notebook 6c Prpk

By Michael J. Gelb

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Innovate Like Edison

By Michael Gelb

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Read Sarah Miller Caldicott's posts on the Penguin Blog.Michael J. Gelb, author of the international bestseller How to Think Like Leonardo da Vinci, and Sarah Miller Caldicott, a descendant of Thom...

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.