Michael Northrop Books

Stone Warriors

By Michael Northrop

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Sports Illustrated KIDS Photo Finishes.

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Dear DC Super Villains

By Michael Northrop

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Dear DC Super-Villains

By Michael Northrop

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The Tip Line of Evil is open! WICKED. INQUIRIES. ONLY.Peek inside the lives of DC’s infamous rogues gallery in Dear DC Super-Villians, where curious kids write to notorious scoundrels, asking...

Teen Titans Go!: Undead?!

By Michael Northrop

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Jump City is full of strange, shambling creatures muttering about sales and dead-set on brains. The Teen Titans saw a comet fall from the sky and can think of nowhere better to hang out and see wha...

Young Alfred: Pain in the Butler

By Michael Northrop

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Bruce Wayne wouldn’t be Batman without his righthand man, Alfred Pennyworth. But was Alfred born to be the greatest butler in the world? Not exactly…When Alfred attends the presti...

Trapped

By Michael Northrop

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Tombquest Die Schatzjager Band 01

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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.