Jarrett Krosoczka Books

Peanut Butter and Jellyfish

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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...

Peanut Butter and Jellyfish

By Jarrett Krosoczka

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"Best friends Peanut Butter and Jellyfish are constantly being taunted by their neighbor, Crabby, until they help him out of a jam"--Provided by the publisher. Best friends Peanut Butter and Jelly...

Lunch Lady and the Author Visit Vendetta

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Dee, Terrence, and Hector are very excited about Author Visit Day. Lewis Scribson is the author of the famous Flippy Bunny books, and Hec...

Lunch Lady and the Summer Camp Shakedown

By Jarrett Krosoczka

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From the author of National Book Award finalist Hey, Kiddo.Lunch Lady and the Breakfast Bunch kids are looking forward to a relaxing summer vacation with no funny business. What evils could befall...

Punk Farm on tour

By Jarrett Krosoczka

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While Farmer Joe is at the National Tractor Society Conference in Reno, his animals go on tour in a broken-down van, performing as the band called Punk Farm.

Lunch lady and the cyborg substitute

By Jarrett Krosoczka

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The school lunch lady is a secret crime fighter who uncovers an evil plot to replace all the popular teachers with robots.

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.