Howard Hendrix Books

The Outer Limits

By Howard Hendrix, Harlan Ellison, Diane Duane, Richard A. Lupoff

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The Outer Limits Volume One Outer Limits

By John M. Ford, Howard Hendrix, Harlan Ellison, Diane Duane

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Reliable rain

By Howard V. Hendrix

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A Journey to the Center of the Earth

By Jules Verne

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Onde stationnaire

By Howard Hendrix, Guy Abadia

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In a secret war waged in worlds both virtual and real, the fates of nations depend on the definitive weapon. And that weapon is knowledge—knowledge to die for. . . .The race is heating up between t...

Spears of God

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In the early decades of the twenty-first century, the most commonly held truth is that knowledge is power. Yet a select few men and women begin to suspect what few will admit: we know nothing at...

Orbital Park

By Howard Hendrix, Guy Abadia

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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.