Jenn Harney Books

In this hilarious, tongue-in-cheek picture book about manners, zoo animals attempt to follow proper etiquette when they are accidentally invited to tea with the queen."Sit up straight. Don't slump....

Probably a Narwhal

By Shelley Moore Thomas Illustrated By Jenn Harney

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Friendship is the winner in this hilarious contest between a girl who blames a narwhal for her mess and the narwhal who shows up to defend himself!This girl's room is an amazing mess between the pi...

CATastrophe!

By Ann Marie Stephens Illustrated By Jenn Harney

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Nine kittens go on an exciting boating adventure that’s a (funny) catastrophe in this playful picture book that demonstrates the key math concept of patterns. A crew of hungry kittens an...

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.