Harley Jane Kozak Books

“Dating Dead Men, Harley Jane Kozak’s hilarious debut novel, proves that the search for love can be as funny as it is deadly.”—Kris Neri, author of the Agatha, Anthony and M...

Dead Ex

By Harley Jane Kozak

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Wollie Shelley—the endearing, idiosyncratic heroine of the award-winning Dating Dead Men, Dating Is Murder, and A Date You Can’t Refuse—returns in a funny murder mystery set in th...

A Date You Can't Refuse

By Harley Jane Kozak

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“A page-turner of a mystery. A loveable sleuth. A real winner!”—Janet EvanovichSerial dater and greeting-card artist Wollie Shelley goes undercover in a media-training company sus...

Dating dead men

By Harley Jane Kozak

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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.