Derek Fridolfs Books

Being the new kid at school is tough, especially when your school is called Doomvale Academy and your name is Bruce Wayne. There's a gang of jokers roaming the halls, a muscle-headed kid named Bane...

Study Hall of Justice

By Dustin Nguyen, Derek Fridolfs

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Study Hall of Justic

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Roadkill Zoo

By Michael Duggan, Nicole Jones, Derek Fridolfs, Glenn Dion, Nick Bradshaw

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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.