Gordon McAlpine Books

The Tell-Tale Start

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Meet Edgar and Allan Poe -- twelve-year-old identical twins, the great-great-great-great-grandnephews of Edgar Allan Poe. They look and act so much alike that they're almost one mischievous, prank-...

The Tell-Tale Start

By Gordon McAlpine

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Once Upon a Midnight Eerie: The Misadventures of Edgar &amp Allan Poe, Book Two

By Gordon McAlpine

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In The Tell-Tale Start, Edgar and Allan Poe (great-great-great-great-grandnephews of the legendary Edgar Allan Poe) managed to outwit the nefarious Professor P. Pangborn Perry, who was (and is) det...

Once Upon a Midnight Eerie

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The Pet and the Pendulum: The Misadventures of Edgar &amp Allan Poe, Book Three

By Gordon McAlpine

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In The Tell-Tale Start, twins Edgar and Allan Poe foiled the nefarious Professor Perry, who wanted to use them in his deadly quantum entanglement experiment. In Once Upon a Midnight Eerie, they too...

The Pet and the Pendulum

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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.