Derek Fridolfs Books

Batman

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"In these stories originally available only online and tying into the bestselling video game BATMAN: ARKHAM CITY, Dr. Hugo Strange has gained control of Arkham Asylum and is determined to keep the...

Arkham Unhinged

By Federico Dallocchio, Christian Duce, Karen Traviss, Christopher Mitten, Tony Shasteen

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Superman Batman

By Randy Mayor, Mike McKone, Mike Johnson, Rob Leigh, Alan Burnett, Shane Davis, Alex Sinclair, Jonathan Glapion, Rebecca Duchman, Andy Lanning, Joe Kelly, Dan Abnett, Dustin Nguyen, Pete Pantazis, Scott Kolins, Derek Fridolfs, Matt Banning, Jorge Molina, Jason Wright

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"The critically acclaimed series returns in this fifth volume of the series with new creative team Alan Burnett and Dustin Nguyen. It has become clear to Superman, Batman and the Justice League tha...

Gotham Academy Vol. 3: Yearbook

By Brenden Fletcher

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THANKS FOR THE MEMORIES!   A slew of comics’ top writers and artists pay tribute to the coolest school in the DC Universe as GOTHAM ACADEMY ends its first semester with a bang!   Th...

Batman

By Dustin Nguyen, Derek Fridolfs

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Batman Tales

By Dustin Nguyen, Derek Fridolfs

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Where Are You

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Science Fair Crisis

By Derek Fridolfs, Pamela Lovas

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Detention of Doom

By Derek Fridolfs

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Study Hall of Justice

By Dustin Nguyen, Derek Fridolfs

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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.