Patrick Carman Books

The Black Circle

By Patrick Carman

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Stargazer

By Patrick Carman

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After a tragic attack by an evil force, Alexa and her friend Yipes are stranded in a strange community known as the Five Pillars. Each pillar of rock has its own secrets--and its own challenges. As...

The Land of Elyon 4

By Patrick Carman

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The Black Circle

By Patrick Carman

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The black circle

By Patrick Carman

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"A strange telegram lures fourteen-year-old Amy Cahill and her younger brother, Dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initials NRR, the telegram...

The Land of Elyon 4

By Patrick Carman

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The field of wacky inventions

By Patrick Carman

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Leo and Remi have gotten used to the strangeness of the Whippet Hotel, but when the entire top floor is hoisted into the sky and transported to the field of wacky inventions, they find that they mu...

Ghost in the Machine

By Patrick Carman

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Floors

By Patrick Carman

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Floors 2

By Patrick Carman

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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.