David Gantz Books

The Wuzzle book

By David Gantz

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A collection of cartoons, jokes, crossword puzzles, riddles, scrambled words and other activities.

Race Around the World My Modern World of Words

By David Gantz

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On the Move My Modern World of Words

By David Gantz

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The Biggest Thanksgiving Turkey an Activity Storybook With over 75 Stickers Inside

By David Gantz

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Ms. Agatha in the Case of the Missing Vowels

By David Gantz

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Captain Swifty and his happy hearts band

By David Gantz

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Captain Swifty and his friends form their own band out of home-made instruments and demonstrate a variety of sounds.

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.