JM DeMatteis Books

Justice League Dark

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The fallout from the Justice League Dark's battles with Blight and the Trinity of Sin, during the DC crossover event 'Forever Evil', has left the team in tatters. Zatanna assumes leadership of the...

Spider Man

By Stan Lee, Richard Howell, JM DeMatteis, Glenn Herdling

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Defenders Epic Collection

By Marie Severin, JM DeMatteis, Peter B. Gillis, Ann Nocenti

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Squadron Supreme Classic Omnibus

By Steve Englehart, Mark Gruenwald, JM DeMatteis, Roy Thomas

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Marvel Firsts

By Bill Mantlo, Marvel Comics, Roger Stern

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Spider Man

By J. M. DeMatteis, Mike Zeck

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Larfleeze Vol. 2

By J. M. DeMatteis, Scott Kolins, Keith Giffen, Tyler Kirkham

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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.