Geoffrey Girard Books

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By Geoffrey Girard, Thomas Lockley, Kelley Armstrong

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Yasuke

By Geoffrey Girard, Thomas Lockley

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Yasuke

By Geoffrey Girard, Thomas Lockley

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African Samurai

By Geoffrey Girard, Thomas Lockley

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Cain's blood

By Geoffrey Girard

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Former black ops soldier Shawn Castillo teams up with a boy who has just learned he is a clone of Jeffrey Dahmer to try to capture other teenaged clones of serial killers who escaped from a secret...

Project Cain

By Geoffrey Girard

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Cain's blood

By Geoffrey Girard

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Former black ops soldier Shawn Castillo teams up with a boy who has just learned he is a clone of Jeffrey Dahmer to try to capture other teenaged clones of serial killers who escaped from a secret...

African Samurai

By Geoffrey Girard, Thomas Lockley

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Truthers

By Geoffrey Girard

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Truthers

By Geoffrey Girard

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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.