Kathy Wollard Books

How Come

By Kathy Wollard

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Oh, yuck!

By Joy Masoff

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An alphabetical collection of articles about disgusting things, from acne, ants, and bacteria to worms, x-periments, and zits.

How come

By Debra Solomon, Kathy Wollard

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Answers to approximately 135 of kids' science questions about people, animals, and the natural world, such as why cats purr and why our fingers wrinkle in water.

How Come In the Neighborhood How Come

By Kathy Wollard

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Jungle

By Kathy Wollard, Dan Kainen

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A new Photicular book, which features special 3D images that move as a reader turns the page, covers the most colorful and exotic creatures of the rain forest, and offers a look into one of the mos...

How come

By Kathy Wollard

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Answers over 100 of the questions most frequently asked about the world around us.

Dinosaur

By Kathy Wollard, Dan Kainen

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How Come Every Kid s Science Questions Explained

By Debra Solomon, Kathy Wollard

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Peki Nasil Clz

By Kathy Wollard

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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.