Jonathan Valin Books

Dead Letter
Dead Letter

By Jonathan Valin

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A professor hires a private investigator to reclaim some lost government documents that he thinks were taken by his daughter.

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The Lime Pit
The Lime Pit

By Jonathan Valin

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Dead Letter
Dead Letter

By Jonathan Valin

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Day of Wrath A Harry Stoner Mystery
Second chance
Second chance

By Jonathan Valin

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Missing
Missing

By Jonathan Valin

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Extenuating circumstances
Extenuating circumstances

By Jonathan Valin

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The lime pit
The lime pit

By Jonathan Valin

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Final notice
Final notice

By Jonathan Valin

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Day of Wrath
Day of Wrath

By Jonathan Valin

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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.

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