Michelle Knudsen Books

Carl the Complainer

By Michelle Knudsen Illustrated By Maryann Cocca Leffler

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The popular Social Studies Connects series links history, geography, civics and economics to kids’ daily lives. Featuring stories with diverse characters who face situations young readers can...

A Moldy Mystery

By Michelle Knudsen Illustrated By Barry Gott

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Solve kid-sized dilemmas and mysteries with the Science Solves It! series. These fun books for kids ages 5–8 blend clever stories with real-life science. Why did the dog turn green? Can you c...

Bugged Science Solves It

By Michelle Knudsen

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Un Leon En La Biblioteca Library Lion

By Michelle Knudsen

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A lion starts visiting the local library but runs into trouble as he tries to both obey the rules and help his librarian friend.

Le roi de la bibliotheque

By Knudsen Michelle Hawkes Kevin

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Toshokan raion

By Michelle Knudsen

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A lion starts visiting the local library but runs into trouble as he tries to both obey the rules and help his librarian friend.

Kuf Gizemi Bilim Bunu Cozer

By Michelle Knudsen

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Sira Disi Hediye Bilim Bunu Cozer

By Michelle Knudsen

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El lleo de la biblioteca

By Michelle Knudsen, Kevin Hawkes

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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.