Howard Porter Books

"In "The Savage Dawn," Superman is forced to join a super-fight club--and the stakes couldn't be higher. The Man of Steel must make a fateful choice. Can he risk exposing himself to the one thing t...

Dark Nights: Metal: The Resistance

By Bryan Hitch

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The alternate, twisted versions of Batman--the Seven Dark Knights of the Dark Multiverse--are hunting the Justice League as the Leaguers attempt to locate artifacts that might protect Earth. One by...

JLA Vol. 6

By Mark Pajarillo, Howard Porter, Grant Morrison, J. M. Dematteis

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JLA Vol. 2

By Howard Porter, Grant Morrison, John Dell

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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.