John Geiger Books

The third man factor

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From Sir Ernest Shackleton on South Georgia Island, to currency trader Ron DiFrancesco in the South Tower of the World Trade Center, hundreds of people in life-threatening situations have shared an...

Nothing Is True Everything Is Permitted

By John Geiger

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Der eisige Schlaf. Das Schicksal der Franklin Expedition.

By John Geiger, Owen Beattie

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Dead Silence

By John Geiger, Owen Beattie

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Chapel of Extreme Experience

By John Geiger

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John Geiger traces the history of how a visual phenomenon first described two hundred years ago by physiologist Jan Purkinje has become the basis of further scientific studies into how the visual b...

Frozen in Time

By John Geiger, Owen Beattie

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Frozen in Time: The Fate of the Franklin Expedition

By John Geiger

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The international bestseller revealing the fate of the doomed Franklin Expedition—now with a new afterword on the discovery of Erebus and Terror, and a new section of color photos. In 1845, Sir Jo...

Franklin's Lost Ship: The Historic Discovery of HMS Erebus

By John Geiger, Alanna Mitchell

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The greatest mystery in all of exploration is the fate of the 1845–1848 British Arctic Expedition commanded by Sir John Franklin. All 129 crewmen died, and the two ships seemingly vanished without...

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.