Lisa Trumbauer Books

Mike Fink
Mike Fink

By Lisa Trumbauer

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Alaska Major
Alaska Major

By Lisa Trumbauer

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I swear I saw a witch in Washington Square
I swear I saw a witch in Washington Square

By Lisa Trumbauer

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Children from New York to Seattle spy a variety of monsters on Halloween.

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Has anyone seen my green dinosaur?
Hopes fulfilled
Hopes fulfilled

By Lisa Trumbauer

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Marian Anderson
Marian Anderson

By Lisa Trumbauer

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No more bullies
No more bullies

By Lisa Trumbauer

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Learn how Henry discovers how to stand up to bullies.

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Animal Ears Yellow Umbrella Books
Food for Thought Yellow Umbrella Books
Teamwork Yellow Umbrella Books

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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.

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