Joan Holub Books

Doll Hospital 06 Doll Hospital
The haunted states of America
The haunted states of America

By Joan Holub

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Tatiana Comes to America Display
Tatiana Comes to America
Tatiana Comes to America

By Joan Holub

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Why Do Dogs Bark 2003
Why Do Dogs Bark 2003

By Joan Holub

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My First Book of Sign Language
Why do snakes hiss
Why do snakes hiss

By Joan Holub

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Provides answers to questions about the behaviors and characteristics of snakes, lizards, and turtles.

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Why Do Snakes Hiss
Why Do Snakes Hiss

By Joan Holub

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Pen pals
Pen pals

By Joan Holub

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Her excitement at having a pen pal quickly turns to disappointment when Daisy, a second-grader, receives some unwelcome news about this new "friend."

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Pen pals
Pen pals

By Joan Holub

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Her excitement at having a pen pal quickly turns to disappointment when Daisy, a second-grader, receives some unwelcome news about this new "friend."

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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.

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