Kathleen Harshberger Books

My First Picture Dictionary

By Kathleen Harshberger

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Defines more than 1100 vacabulary entries and uses some 500 illustrations

My First Picture Word Book

By Kathleen Harshberger

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Labeled pictures of 1300 familiar things are grouped by concepts such as animals, holidays, and supermarket.

My first picture dictionary

By Kathleen Harshberger, Playmore, Harshberger

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Alphabetically arranged words are defined by illustrations.

Etiquette Still Matters

By Kathleen Harshberger

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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.