Cynthia Chapin Books

Healthy is happy.

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After a visit to the medical center for checkups, two children become interested in the many private and public services that help keep people healthy.

Clean streets, clean water, clean air.

By Cynthia Chapin

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An easy-to-read text describes how air, water, and streets become polluted and how they are cleaned.

Squad Car 55 Community Helpers Series

By Cynthia Chapin

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News Travels

By Dale Fleming, Cynthia Chapin

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What Will the Weather Be

By P. J. Hoff, Cynthia Chapin

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Wings and Wheels

By Kevin Royt, Cynthia Chapin

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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.