Tracee De Hahn Books

Inspector Agnes Luthi, a Swiss-American police officer in Lausanne, Switzerland, has just transferred to the Violent Crimes unit from Financial Crimes to try to shed all reminders of her old life f...

A well timed murder

By Tracee De Hahn

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"Swiss-American police officer Agnes Lüthi is on leave in Lausanne, Switzerland, recovering from injuries she sustained in her last case, when an old colleague invites her to the world's premier wa...

Great Disasters

By John Riddle, John Ziff, Tracee De Hahn

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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.