Katherine Marsh Books

The Twilight Prisoner The Night Tourist Book 2

By Katherine Marsh

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Night Tourist

By Katherine Marsh

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The twilight prisoner

By Katherine Marsh

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In an effort to impress a female classmate, high school sophomore Jack Perdu endangers both of their lives by taking her to New York City's Underworld, where those who died in New York reside until...

The Twilight Prisoner - Audio Library Edition

By Katherine Marsh

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The Twilight Prisoner - Audio

By Katherine Marsh

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The Twilight Prisoner Postcard

By Katherine Marsh

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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.