Thomas Krajewski Books

Elder Interventions

By Thomas Krajewski M.D.

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Primer

By Thomas Krajewski

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Artistry and super-heroics collide ain this new superhero story!Thirteen-year-old Ashley Rayburn is an upbeat girl with a decidedly downbeat past. With a father in prison, Ashley has bounced from f...

Primer: Clashing Colors

By Thomas Krajewski

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Primer’s made a splash, but does she have what it takes to be a Teen Titan?Ashley wants nothing more than to be taken seriously as a superhero—she can't help it that things don't always...

Primer

By Jennifer Muro, Gretel Lusky, Thomas Krajewski

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MARVEL ZOMBIES: DAWN OF DECAY

By Thomas Krajewski

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A new zombie virus is unleashed onto the Marvel Universe… and Groot is patient zero!Young readers age 10-14 will love this horror graphic novel with zombie versions of your favorite Marvel s...

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.