John Kloepfer Books

Galaxy s Most Wanted

By John Kloepfer, Nick Edwards

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Into the dorkness

By John Kloepfer

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Kevin and his science camp buddies, The Extraordinary Terrestrials, defeated the alien Mim and sent him back to prison--but now a group of his friends have shown up in spaceships, bent on revenge,...

Galaxy s Most Wanted 2

By John Kloepfer, Nick Edwards

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Galaxy s Most Wanted 3

By John Kloepfer, Nick Edwards

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Into the dorkness

By John Kloepfer

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Kevin and his science camp buddies, The Extraordinary Terrestrials, defeated the alien Mim and sent him back to prison--but now a group of his friends have shown up in spaceships, bent on revenge,...

Monsters Unleashed 2: Bugging Out

By John Kloepfer

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Just when Freddie Liddle thought he could catch a break, a new kind of terror infests his town: slimy, disgusting, man-eating, self-replicating bugs. But these aren t just any pests these bugs were...

Monsters Unleashed 2

By Mark Oliver, John Kloepfer

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Zombies of the Caribbean

By John Kloepfer

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Escaping the mainland for the Caribbean, Zack Clarke and his team search for an eccentric explorer and renowned zombie expert who may be able to cure the zombie pandemic. The zombie chasers head t...

Zombies of the Caribbean

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Zombie Chasers 6

By David DeGrand, 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.