Nancy E. Krulik Books

The case of the green guinea pig

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The big school trip was at the end of the week, and Jack couldn't wait. But someone kept playing pranks at school including dyeing the class guinea pig green, and Principal Bumble threatened to can...

Tip Top Tappin Mom Katie Kazoo Switcheroo

By Nancy E. Krulik

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Katy Kazoo Switcheroo

By Nancy E. Krulik

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Trouble magnet

By Nancy E. Krulik

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As the students at his school prepare for a talent show and class presentations about Hawaii, fourth-grader George tries hard to behave but his magic super burps keep getting him in trouble.

Super Burp 1 George Brown Class Clown

By Nancy E. Krulik

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Katie Kazoo Switcheroo Don t Be Such a Turkey

By Nancy Kurlik, John Wendy

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World s worst wedgie

By Nancy E. Krulik

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Ten-year-old George Brown tries his best to earn money for a special toy he wants, but whether he is working in his mother's craft shop or setting up a backyard circus, the magic burps erupt at exa...

El Autobus Magico Se Queda Plantado UN Libro Sobre LA Fotosintesis Magic School Bus Gets Planted

By Nancy E. Krulik, Mary Pope Osborne, Lenore Notkin

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Quest for Camelot

By Nancy E. Krulik

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Quest for Camelot

By Nancy E. Krulik

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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.