John Kloepfer Books

Galaxy's Most Wanted

By John Kloepfer

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Galaxy's Most Wanted 3

By John Kloepfer, Nick Edwards

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Starship bloopers

By John Kloepfer

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When comic book creator Max Grayson is taken prisoner, Kevin and his friends set out on a rescue mission that puts them in the middle of an intergalactic war.

World zombination

By John Kloepfer

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Traveling across the world, Zack Clarke and his zombie-fighting team search for an antidote that will stop the outbreak forever.

The Zombie Chasers 7

By John Kloepfer

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Monsters unleashed

By John Kloepfer

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Freddie Liddle has a big problem: Monsters. Giant, fire-breathing, electric-shocking, bone-crunching monsters are attacking his town. Even worse, it s Freddie s fault. After drawing monsters based...

Monsters Unleashed

By John Kloepfer

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Monsters Unleashed 2: Bugging Out

By John Kloepfer

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Undead Ahead

By John Kloepfer

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Les chasseurs de zombies

By John Kloepfer

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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.