Mary Calhoun Books

Big Sixteen

By Jean Little

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Big Sixteen's extra size and strength get him into trouble when The Old Man asks him to fetch the devil.

Jack and the whoopee wind

By Jean Little

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Mad at the wind for blowing everything away, Jack tries a succession of ways to stop it.

Jack and the whoopee wind

By Jean Little

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Mad at the wind for blowing everything away, Jack tries a succession of ways to stop it.

While I sleep

By Jean Little

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Mama and Papa explain to their child at bedtime where all the other creatures go to sleep.

While I sleep

By Jean Little

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Mama and Papa explain to their child at bedtime where all the other creatures go to sleep.

Cross Country Cat

By Mary Calhoun, Sara Pyle

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High-Wire Henry

By Jean Little, Mary Calhoun

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Although Henry the cat learns tightrope walking only to impress the humans in his family, who have stopped paying attention to him because of their new puppy, his skill comes in handy when the pupp...

High-wire Henry

By Jean Little

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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.