Greg Spalenka Books

The Watch

By Dennis Danvers

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Jack Faust

By Michael Swanwick

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Unlike the classic Mephistopheles, the seductive demon who approaches Swanwick's Johannes Faust is not the devil as we know him, but rather a representative of a mysterious race that seeks nothing...

Watch

By Dennis Danvers

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The art of Greg Spalenka

By Greg Spalenka

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"Greg Spalenka has worked as a professional artist in creative art industries including publishin and film for over 30 years. This book celebrates Spanlenka's personal vision as a multi-disciplinar...

The Art of Greg Spalenka

By Greg Spalenka

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Having graduated from the prestigious Art Center College of Design, Greg Spalenka has been producing commercial and fine art for over 30 years. With a client list including film studios, magazines,...

Jack Faust

By Michael Swanwick

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The Watch

By Dennis Danvers

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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.