John Edeen Books

Provides short biographies and reproducible outline portraits of 15 scientists: Maria Mitchell, Marie Curie, Mary Engle Pennington, Lillie Minoka-Hill, Lise Meitner, Margaret Morse Nice, Tilly Edin...

Mathematicians Book 1 (Portraits for the Classroom Bulletin Boards)

By Susan Edeen, John Edeen

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Provides reproducible outline portraits of 15 mathematicians who lived between 624 B.C. and 1624 A.D., and brief biographical information about each individual.

Mathematicians, book 2

By Susan Edeen, John Edeen

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Presents reproducible line portraits of 15 mathematicians who lived between 1571 and 1855, accompanied by brief biographical information about each individual.

Women Mathmaticians Portraits for Classroom Bulletin Boards

By J. Edeen

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Portraits for Classroom Bulletin Boards

By Susan Edeen, John Edeen

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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.

John Edeen Books

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?