Robert Gleason Books

Wrath of God

By Robert Gleason

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Aztec fire

By Gary Jennings

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Apocalypse 2012

By Gary Jennings

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The Nuclear Terrorist

By Robert Gleason

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The evil that men do

By Robert Gleason

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Income inequality and the offshore hoarding of illicit black funds have reached such extremes that the earth's democracies are in peril. The oligarchs are taking over. The People worldwide, however...

Aztec Rage Aztec

By Robert Gleason, Gary Jennings, Junius Podrug

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Aztec Fire

By Robert Gleason, Gary Jennings, Junius Podrug

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Apocalypse 2012

By Gary Jennings

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Scientists discover the Aztec-Mayan End-Time Codex, which foretells the end of the world in 2012, and must struggle to crack the code before it's too late.

End of Days

By Robert Gleason

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The Evil That Men Do

By Robert Gleason

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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.