Kellen Hertz Books

Tenney In The Key Of Friendship

By Kellen Hertz

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Tenney Shares The Stage Turtleback School Library Binding Edition American Girl

By Kellen Hertz

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Tenney

By Kellen Hertz

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When aspiring songwriter Tenney gets invited to perform at Nashville's famed Bluebird Café, her parents decide she's too young to perform professionally, leaving her future hanging in the balance.

Tenney in the key of friendship

By Kellen Hertz

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Tenney's manager books her and new drummer Logan to play at Nashville's City Music Festival the same day as she's supposed to perform at her friend Jaya's charity fund-raiser, and Tenney must decid...

Tenney 3 Book Box Set

By Kellen Hertz

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Lea and Camila

By Lisa Yee

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For spring break, Lea has invited her friend Camila to St. Louis for a stateside adventure. They find a stray kitten and make a mysterious discovery while visiting a grand but crumbling mansion. Le...

Historical Character Book 1

By Kellen Hertz

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Courtney Friendship Superhero

By Kelley McMorris, Kellen Hertz, Blake Morrow

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Tenney Shares the Stage

By Kellen Hertz

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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.