Arthur Upgren Books

Night Has a Thousand Eyes: A Naked-Eye Guide to the Sky, Its Science, and Lore

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Filled with science and lore, with references to myths, legends, and "high" and popular culture, this "naked-eye" guide (no telescope required) demystifies the celestial in accessible, instructive,...

Night Has a Thousand Eyes

By Arthur Upgren

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Weather

By Arthur Upgren, Jurgen Stock

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The Turtle and the Stars

By Arthur Upgren

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The Turtle and the Stars

By Arthur Upgren

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Many Skies Alternative Histories of the Sun Moon Planets and Stars

By Arthur Upgren

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Many Skies

By Arthur R. Upgren

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Weather

By Arthur Upgren

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Weather

By Arthur Upgren, Jurgen Stock, Arthur R. Upgren

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"Experts in meteorology and astronomy, Upgren and Stock take us on a grand tour of Earth's weather. Amid colorful anecdotes of the Galapagos, Siberia, and places closer to home, they describe the f...

Many Skies

By Arthur Upgren

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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.