Karen Zager Books

Finding Your Voice

By Andrea Thompson, Dorothy Cantor, Ellen McGrath, Lenore Walker, Karen Zager, Sandra Haber, Alice Rubenstein, Carol Goodheart

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Caterpillar hot Air B Caterpillar Board Books

By Karen Zager

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Caterpillar circus Caterpillar Board Books

By Karen Zager

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Caterpillar bubbles Caterpillar Board Books

By Karen Zager

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The Inside Story on Teen Girls

By Karen Zager, Alice Rubenstein

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In this video, you will see a provocative discussion between the host and Dr. Zager, the leading expert in working with adolescents; an actual therapy session with a real client; and a lively quest...

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.