John Glasby Books

Encyclopedia of the Alkaloids: Volume 4

By John Glasby

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The Lonely Shadows and Other Stories

By John Glasby

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The midnight moon rode high and the house seemed to transmute the moonlight into something terrible. The broken chimneys stretched up like hands to the heavens, the eyeless sockets of the windows s...

Encyclopedia of the Alkaloids

By John Glasby

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Sole Survivor

By John Glasby

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The Antarktos Cycle

By Edgar Allan Poe, Arthur C. Clarke, Colin Wilson, H.P. Lovecraft, John Glasby, Jules Verne, Eric Temple Bell, Roger Johnson

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The Savage City

By John Glasby

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A Time for Murder

By John Glasby

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The Undead

By John Glasby

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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.