Constance Green Books

Al(exandra) the Great

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Her best friend's family helps cushion the blow when Al must sacrifice a summer visit to her father's farm in order to take care of her sick mother in New York City.

Double Dare O Toole

By Constance C. Greene

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Eleven-year-old Fex O'Toole's inability to resist a double dare gets him into a lot of trouble.

Isbelle Shows Her ST

By Constance Green

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Star shine

By Constance C. Greene

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When their stage-struck mother joins a summer theater group, Jenny and Mary learn to take care of themselves until a movie company comes to town and Jenny lands a part.

The Secret City

By Constance Green

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Eli Whitney and the Birth of American Technology

By Constance McLaughlin Green

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Just Plain AL

By Constance Green

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Ordnance Department

By Harry Thomson, Peter Roots, Constance Green

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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.