Roy Johansen Books

Shadow Zone

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A killer crosses over…Ace magician turned ace police detective Joe Bailey, a.k.a. the Spirit Basher, needs all his expertise when he’s teamed up with psychic investigator Monica Gaines to crack a s...

Deadly visions

By Roy Johansen

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Close Your Eyes

By Iris Johansen, Roy Johansen

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Shadow Zone

By Iris Johansen, Roy Johansen

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Look Behind You A Novel Kendra Michaels

By Iris Johansen, Roy Johansen

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Double Blind

By Iris Johansen, Roy Johansen

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The Naked Eye

By Iris Johansen, Roy Johansen

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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.