James A. Connor Books

Kepler's Witch: An Astronomer's Discovery of Cosmic Order Amid Religious War, Political Intrigue, and the Heresy Trial of His Mother

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This largely untold story of the "Protestant Galileo," Johannes Kepler, vividly brings to life the tidal forces of the Reformation and Counter-Reformation, revealing Kepler's neglected role as a he...

Kepler's Witch: An Astronomer's Discovery of Cosmic Order Amid Religious War, Political Intrigue, and the Heresy Trial of His Mother

By James A. Connor

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Pascal's Wager: The Man Who Played Dice with God

By James A. Connor

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The Last Judgment: Michelangelo and the Death of the Renaissance

By James A. Connor

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The Last Judgment

By James A. Connor

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Pascal s Wager

By James A. Connor

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God's breath and other stories

By James A. Connor

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The Washington lobby.

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Ontdek de rust in jezelf

By Connor James A.

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Kepler s Witch

By James A. Connor

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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.