Mort Castle Books

J. N. Williamson s Masques

By Daerick Gross, Robert C. McCammon, Stephen King, James Kisner, Mort Castle

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New Moon on the Water (2018 Trade Paperback Edition)

By Andrew Smith, F. J. Bergmann, Jeffrey Thomas, Vincent Chong, Mort Castle

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The masters of horror have united to teach you the secrets of success in the scariest genre of all!In On Writing Horror, Second Edition, Stephen King, Joyce Carol Oates, Harlan Ellison, David Morre...

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.