Mike Krahulik Books

Penny Arcade Volume 10

By Mike Krahulik, Jerry Holkins

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Attack of the Bacon Robots

By Mike Krahulik, Jerry Holkins

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Penny Arcade Volume 3

By Mike Krahulik, Jerry Holkins

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Penny Arcade Volume 4

By Mike Krahulik, Jerry Holkins

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The Splendid Magic Of Penny Arcade

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Penny Arcade 6: The Halls Below

By Mike Krahulik, Jerry Holkins

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FROM UNTOLD STYGIAN DEPTHS, IT RISES Gaze, if you dare, in benumbed awe upon its unfathomably cyclopean dimensions of obsidian impossibility. Cower before its undulating, multitendriled tales of u...

“WHO DARES DISTURB THE CRYPT OF THE IMMORTAL SPACE BITCHES?” The answer may very well be here—along with blatant abuse of Nerf weapons, highly questionable pizza toppings, murderous exploding pengu...

Lexcalibur II

By Mike Krahulik, Jerry Holkins

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Penny Arcade Volume 2

By Mike Krahulik, Jerry Holkins

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Case of the Mummy s Gold

By Mike Krahulik, Jerry Holkins

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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.