Sheila Keenan Books

Brief biographies of nearly 500 men and women who shaped United States history including, for each, a photograph or picture, birth and death dates, and a brief essay describing why that person is n...

Myrtle's Turtles (Hello Reader! Math. Level 3)

By Sheila Keenan

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Myrtle's pet shop specializes in animals that swim, until the day that several strange boxes are left on her doorstep. Includes related multiplication activities.

O Say Can You See

By Sheila Keenan

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Gods Goddesses And Monsters

By Sheila Keenan

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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.