Claire Zulkey Books

Best frenemies

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"Side by side by side? Alice Kinney shouldn't be nervous about starting middle school. She's got her best friend, Cassidy, by her side, so it can't be that bad, right? Except, Cass isn't at her sid...

Girls Girls Girls

By Claire Zulkey

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Picture Perfect 3

By Cari Simmons, Claire Zulkey

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An off year

By Claire Zulkey

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Upon arriving at her dorm room, eighteen-year-old Cecily decides to postpone her freshman year of college and return to her Chicago home, where she spends a year pondering what went wrong while for...

An Off Year

By Claire Zulkey

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AN Off Year

By Claire Zulkey

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Cecily has always done everything as she was supposed to: taken the right classes, gotten the right grades, applied to the right colleges. But after a lifetime of following the rules, she surprises...

Best Frenemies

By Cari Simmons, Claire Zulkey

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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.