Nancy E. Krulik Books

Girls Don t Have Cooties

By Nancy E. Krulik

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Red White and Achoo

By Nancy E. Krulik

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Anyone But Me 1

By Wendy, Nancy Krulik Illustrated By John

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Katie Carew, nicknamed Katie Kazoo by the class bully, had no idea what would happen when she wished that she could be anyone but herself. But now her wish has come true, and-switcheroo!-she keeps...

Oh, Baby! 3

By Wendy, Nancy Krulik Illustrated By John

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Katie and Suzanne want to see the new big movie, Tornado, but neither of their parents will let them. As Suzanne complains loudly about always being treated like her baby sister, Katie actually bec...

Girls Don't Have Cooties 4

By Wendy, Nancy Krulik Illustrated By John

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Katie has plans to go to Suzanne's all-girl sleepover party, but Jeremy wants her to ride the hot new rollercoaster. Annoyed, Jeremy and the other boys from Class 3A decide that all girls have coot...

Red, White, and--Achoo! 33

By Wendy, Nancy Krulik Illustrated By John

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It's Presidents' Day, and everyone in class 4A is psyched. It means that they each get to dress up as a president and give an oral report in front of the class. But Katie finds herself on shaky gro...

Adam Brody

By Nancy E. Krulik

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Puppy Love

By Nancy E. Krulik

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Ripped at the Seams

By Nancy E. Krulik

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Jamie Lynn Spears Biography

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.