Perri O Shaughnessy Books

Keeper of the keys

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The disappearance of his wife, Leigh, sends obsessive and brilliant architect Ray Jackson on a quest to discover the truth about the incident, while Leigh's best friend launches an investigation in...

Sinister shorts

By Perri O Shaughnessy

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Sinister Shorts

By Perri O Shaughnessy

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Presumption of death

By Perri O Shaughnessy

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Case of Lies Nina Reilly

By Perri O Shaughnessy

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Keeper of the keys

By Perri O Shaughnessy

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Motion to Suppress

By Perri O Shaughnessy

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Invasion of Privacy

By Perri O Shaughnessy

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Motion to Suppress

By Perri O Shaughnessy

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Invasion of Privacy

By Perri O Shaughnessy

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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.