Roy Johansen Books

Look Behind You

By Iris Johansen, Roy Johansen

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Double Blind

By Iris Johansen, Roy Johansen

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Silent Thunder

By Jennifer Van Dyck, Iris Johansen, Roy Johansen

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Double blind

By Iris Johansen

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Kendra Michaels is reluctant to help the FBI with the most recent case they've brought to her...until she hears the details: The body was found just blocks away from Kendra's condo. The man was car...

Blink of an Eye

By Iris Johansen, Roy Johansen

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More Than Meets the Eye

By Iris Johansen, Roy Johansen

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Blink of an Eye

By Iris Johansen, Roy Johansen

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More Than Meets the Eye

By Iris Johansen, Roy Johansen

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More Than Meets the Eye

By Roy Johansen, Iris Johansen

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More Than Meets the 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.