Chris Knopf Books

Bad Bird: A Mystery

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Investigating an unusual set of photos taken by a plane crash victim, Jackie Swaitkowski is surprised to discover familiar, notorious faces in the pictures and realizes that the plane crash may be...

When the old lady next door is found dead in her bathtub, corporate dropout Sam Acquillo is the only one who wonders why. Despite himself he finds himself uncovering secrets no one could have imagi...

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.