Les Johnson Books

On to the Asteroid

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"The year is 2065 and an accidental encounter in space leads to the discovery that we are not alone and that our continued existence may be in jeopardy. Chris Holt, working at the Space Resources C...

Mission to Methone

By Les Johnson

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Harvesting Space for a Greener Earth

By Greg Matloff, Les Johnson, C Bangs

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Rescue mode

By Ben Bova

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"The first human mission to Mars meets with near-disaster when a meteoroid strikes the spacecraft, almost destroying it. The ship is too far from Earth to simply turn around and return home. The ei...

Living Off the Land in Space

By Greg Matloff, Les Johnson, C Bangs

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Solar Sails

By Giovanni Vulpetti, Gregory L. Matloff, Les Johnson

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The reality of sunlight-based sailing in space began in May 2010, and solar sail technology and science have continued to evolve rapidly through new space missions. Using the power of the Sun's li...

Fly-fishing coastal cutthroat trout

By Les Johnson

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Fly-fishing coastal cutthroat trout

By Les Johnson

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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.