Alexander Ahndoril Books

The Mirror Man

By Alexander Ahndoril, Alice Menzies, Alexandra Coelho Ahndoril, Lars Kepler

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#1 INTERNATIONAL BEST SELLER • Detective Joona Linna is on the trail of a kidnapper who targets teenage girls and makes their worst nightmares a reality.  "Dark, disturbing, and chil...

The Spider

By Alexander Ahndoril, Alice Menzies, Alexandra Coelho Ahndoril, Lars Kepler

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#1 INTERNATIONAL BEST SELLER • A serial killer is spinning a sinister web and Detectives Joona Linna and Saga Bauer are caught dead center. This pulse-pounding descent into the chil...

Director

By Alexander Ahndoril

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I Will Find the Key

By Alexander Ahndoril

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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.