JoAnn Early Macken Books

Amazing Invertebrates Time for Kids

By JoAnn Early Macken

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Mail carriers

By JoAnn Early Macken

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Photographs and simple text in English and Spanish depict the activities of a mail carrier.

Puppies

By JoAnn Early Macken

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Sing-along song

By JoAnn Early Macken

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A child sings along with the songs made by everyday sounds, from the chirping of a robin in the morning to the cooing of baby sister as she falls asleep in the evening.

Budgies

By JoAnn Early Macken

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Guinea Pigs

By JoAnn Early Macken

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Puppies Let s Read About Pets

By JoAnn Early Macken

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Goldfish

By JoAnn Early Macken

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A simple introduction to pets and pet care for children covering various aspects of the animal's development, characteristics, needs and habits. 5-7 yrs.

Rabbits

By JoAnn Early Macken

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Budgies

By JoAnn Early Macken

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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.