Geoff Johns Books

Teen Titans Vol. 3

By Mike McKone, Tom Grummett, Ben Raab, Geoff Johns

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On his own, Gar Logan, a.k.a. Beast Boy, tries to resurrect his acting career in Hollywood, only to find himself framed for a crime he didn't commit. Then, Gar is suddenly normal, but all of the ch...

The Flash Vol. 5

By Geoff Johns

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Green Lantern

By Geoff Johns

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Green Lantern Vol. 1

By Geoff Johns

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Hawkman

By Geoff Johns

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JSA

By David S. Goyer, Geoff Johns

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Teen Titans Vol. 4

By Johns Geoff, Mike McKone, Mark Waid, Geoff Johns

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The Teen Titans travel to the 31st century to help the Legion of Super-heroes stop a threat known as the Fatal Five Hundred. Their return trip drops them ten years in the future, but they aren't ha...

JSA

By Geoff Johns

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Tom Strong Book 4

By Alan Moore Undifferentiated, Geoff Johns, Peter Hogan

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Tom Strong.

By Alan Moore Undifferentiated, Geoff Johns, Peter Hogan, Alan Moore

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Tom Strong, his wife Dhalua, daughter Tesla, and his comrades experience exciting new adventures in exotic locales on Earth, in space, and across time.

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.