Dan Keen Books

Presents fifty-three simple experiments and projects revolving around space science, including topics such as seasons, the night sky, light, and flight.

Science Fair Projects

By Robert L. Bonnet, Dan Keen

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Science Fair Projects

By Robert L. Bonnet, Dan Keen, Bob Bonnet

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Presents projects and experiments that use easy-to-find materials to explore the world of physics, covering such topics as temperature, energy flow, acceleration, sound, pendulums, momentum, magnet...

Science Fair Projects

By Dan Keen, Bob Bonnet

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Science Fair Projects

By Frances W. Zweifel, Dan Keen, Bob Bonnet

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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.

Dan Keen 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?