Mark Shulman Books

Colorful illusions

By Mark Shulman, Aki Nurosi

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Illustrates different types of optical illusions and explains the reason for the illusion in each picture.

Zany Rainy Days

By Hallie Warshaw, Mark Shulman

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Mom and Dad are palindromes

By Mark Shulman

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When Bob realizes that he is surrounded by palindromes, from his mom, dad, and sis Anna to his dog Otto, he discovers a way to deal with the palindrome puzzle.

The Voodoo Revenge Book Gift Set

By Mark Shulman

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Artful Illusions

By Mark Shulman, Aki Nurosi

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The Mini Voodoo Revenge Book and Gift Set

By Mark Shulman, Inc. Sterling Publishing Co.

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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.