Katie Cotugno Books

Liar's Beach

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The New York Times bestseller!A new take on Agatha Christie’s classic murder mystery The Mysterious Affair at Styles, with iconic detective Hercule Poirot recast as a brilliant, brash teen gi...

Hemlock House

By Katie Cotugno

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Last summer there was a murder on Martha's Vineyard. Now a killer's on campus in Cambridge. The follow-up to the New York Times bestselling Liar’s Beach.More than a year after childhood frien...

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.