Marc Hempel Books

Sandman Vol. 9: The Kindly Ones 30th Anniversary Edition

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In the longest Sandman story, Morpheus becomes the prey of the Furies--avenging spirits who torment those who spill family blood. A journey both begins and ends for the Lord of Dreams as threads an...

Gregory Treasury A Volume 2 Gregory Treasury

By Marc Hempel

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Be an Interplanetary Spy

By Marc Hempel, Mark Wheatley, Seth McEvoy

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The Sandman: The Deluxe Edition Book Four

By Neil Gaiman

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One of the most popular and critically acclaimed graphic novels of all time, Neil Gaiman’s awardwinning masterpiece The Sandman set the standard for mature, lyrical fantasy in the modern comi...

The Sandman Book Four

By Neil Gaiman

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From the award-winning writer of American Gods and Coraline, The Sandman is one of the most popular and critically acclaimed graphic novels of all time. Neil Gaimain's award-winning masterpiece set...

The Breathtaker Collection (Graphic Novel)

By Written By Mark Wheatley Art By Marc Hempel

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The long-awaited remastered edition of the acclaimed graphic novel - including an introduction by award-winning comics artist Walt Simonson (Thor, Star Wars, Elric). In Breathtaker, all love wither...

Re Gifters

By Mike Carey, Marc Hempel, Sonny Liew

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Mars

By Marc Hempel, Mark Wheatley

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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.