Marshall Karp Books

A poor art student in New York City discovers a duffel bag full of diamonds in the chaos during an attack at Grand Central Station and is pursued by the Ghost, an assassin who had murdered the bag'...

Kill Me If You Can

By James Patterson, Marshall Karp

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NYPD red 2

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"NYPD Red--the task force attacking the most extreme crimes in America's most extreme city--hunts a killer who is on an impossible mission. A vigilante serial killer is on the loose in New York Cit...

NYPD Red 2

By Marshall Karp

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NYPD Red 2

By James Patterson

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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.