Dan Greenburg Books

Never trust a cat who wears earrings

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Zack starts turning into a cat when the spirit of an ancient Egyptian cat goddess is accidentally transferred into his body during a class field trip.

Who is he really?

By Catherine Daly Weir

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Confessions of a pregnant father

By Dan Greenburg, Dan Greenberg

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Jumbo the Boy Arnold the Elephant

By Dan Greenberg

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Hoop Heroes

By Sydelle Kramer

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Tell a Lie and Your Butt Will Grow

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How I Fixed the Year 1000 Problem Zack Files

By Dan Greenburd

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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.