Charles Okun Books

Dreamcatcher

By William Goldman, Charles Okun, Lawrence Kasdan

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Four friends with an unusual power become stranded in a blizzard and are confronted by a deadly alien force. As they try to stop this unparalleled horror, the fate of the world is in their hands.

Heaven's Gate

By Denis O Dell, Charles Okun, Michael Cimino, Vilmos Zsigmond, Gerald B. Greenberg, Lisa Fruchtman, Joann Carelli

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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.