Joanne Mattern Books

The Trojan Horse
The Trojan Horse

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I Can't Believe My Eyes!
I Can't Believe My Eyes!

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Farm animals
Farm animals

By Hans Reinhard

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Jamberry
Jamberry

By Bruce Degen

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A little boy walking in the forest meets a big lovable bear that takes him on a delicious berry-picking adventure in the magical world of Berryland

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Illness
Illness

By Terri DeGezelle

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Martin Luther King Jr. The Fight for Freedom
Guinness world records.
Guinness world records.

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Describes some of the world's most shocking people, strangest plants, and weirdest animals.

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Maya Miguel
Maya Miguel

By Mary Gruetzke, Joanne Mattern

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Maya finds a special hat the day before Easter, but will it really bring her good luck?

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Albert Einstein Easy Bio
Helen Keller
Helen Keller

By Francene Sabin

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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.

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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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