David Bar Katz Books

The Heaviest God

By David Bar Katz

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Play better chess today

By Rosalyn B. Katz

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Provides an introduction to chess strategy, covering basic rules and moves, the strengths and weaknesses of each piece, and tips for capturing pieces and reaching checkmate.

DC Super Heroes ABC 123

By David Bar Katz

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Busy bodies

By Morris Katz

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The DC Super Heroes illustrate the amazing things the body can do; the book shows different body parts and actions.

DC Super Hero Starter Kit

By David Bar Katz

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Fire and Steel

By Samuel M. Katz

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My First Book of Super Villians

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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.