Jarrett J. Krosoczka Books

Ollie the purple elephant

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Ollie the purple elephant is delighted to move into the McLaughlin family's New York City apartment, but their cat, Ginger, is not pleased and devises a plan to send Ollie away with the circus.

Lunch Lady and the Bake Sale Bandit

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.The Breakfast Bunch is excited for the upcoming bake sale—and the best part is that it's raising money for an awesome field trip. But whe...

Lunch Lady and the Field Trip Fiasco

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Lunch Lady and the Breakfast Bunch are on a school field trip to a famous art museum. But while Lunch Lady is busy taking in all the cultu...

Lunch Lady and the Mutant Mathletes

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.The Breakfast Bunch have joined the mathletes team, and are all set to win the championship trophy for Thompson Brook Elementary School—th...

Lunch Lady and the Picture Day Peril

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.It's picture day at Thompson Brook, but the students are plagued by a freak acne epidemic. While the Breakfast Bunch scrambles to put thei...

Peanut Butter and Jellyfish

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Peanut Butter and Jellyfish are best of friends and swim up, down, around, and through their ocean home.Crabby is their neighbor. He is no...

Lunch Lady and the Cyborg Substitute

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Serving justice . . . and lunch! Hector, Terrence, and Dee have always wondered about their school lunch lady. What does she do when she...

Lunch Lady and the League of Librarians

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Serving justice . . . and lunch! Lunch Lady can sniff out something rotten like no one else—and there’s definitely something rotten going...

Lunch Lady and the mutant mathletes

By Jarrett Krosoczka

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For having skipped the school field trip, Dee, Hector, and Terrence must join the mathletes team but as they are poised to beat the undefeated champions, secret crime fighter Lunch Lady discovers s...

Lunch lady and the picture day peril

By Jarrett Krosoczka

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When eccentric photographer Stefani DePino comes to Thompson Brook to take school pictures in the midst of an acne epidemic, Lunch Lady, Betty, and the Breakfast Bunch learn that Stefani is using t...

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.