Jarrett Krosoczka Books

Lunch Lady and the Mutant Mathletes

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Lunch Lady and the Bake Sale Bandit

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Lunch Lady and the Summer Camp Shakedown

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Comics squad

By Jarrett Krosoczka, Jennifer L. Holm, Matthew Holm

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Calling all kidz! Do you like comics? Do you like laughing till milk comes out of your nose?! Look no further do we have the book for you! All your favorite comic characters are right here in one b...

Comics Squad

By Jarrett Krosoczka, Jennifer L. Holm, Matthew Holm

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An anthology of comics by well-known graphic novelists on the theme of detention.

The force oversleeps

By Jarrett Krosoczka

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"Victor Starspeeder is back at Jedi Academy for year two, but it's not going the way he'd planned. He was thrilled about Drama Club and hoped to get the lead in this year's musical... But a new kid...

Lunch Lady y el sustituto cibernetico

By Jarrett Krosoczka

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The school lunch lady, a secret crime fighter, uncovers an evil plot to replace all the popular teachers with robots. Lunch Lady es una heroína que se hace pasar por la señora de la cafetería y en...

Platypus Police Squad: The Frog Who Croaked

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Platypus Police Squad The Frog Who Croaked

By Jarrett Krosoczka

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Platypus Police Squad

By Jarrett J. Krosoczka

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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.