Katie Porter Books

Daughter of a world famous motocross champion and head on competitor with three brothers Captain Leah Princess Girardi was born with a need for speed. No one tells her what to do especially not men...

Bare Knuckle

By Katie Porter

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Came Upon a Midnight Clear

By Katie Porter

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I Swear

By Katie Porter

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NEW YORK TIMES BESTSELLER • A “high-octane, no-bullshit” (The New Republic) memoir about re-energizing our politics and standing up to corporate America—while carting th...

I Swear

By Katie Porter

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NEW YORK TIMES BESTSELLER • A “high-octane, no-bullshit” (The New Republic) memoir about re-energizing our politics and standing up to corporate America—while carting th...

Messy

By Katie Porter

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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.