Kellerman Jonathan Books

When the Bough Breaks

By Jonathan Kellerman

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Heartbreak Hotel

By Jonathan Kellerman

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The butcher's theater

By Jonathan Kellerman

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Bad Love

By Jonathan Kellerman

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It came in a plain brown wrapper, no return address - an audiocassette recording of a horrifying, soul-lacerating scream, followed by the sound of a childlike voice delivering the enigmatic and hau...

DEVIL'S WALTZ

By Jonathan Kellerman

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Private Eyes Alex Delaware Novels

By Jonathan Kellerman

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Blood Test Alex Delaware Novels

By Jonathan Kellerman

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The Web Alex Delaware Series No. 10

By Jonathan Kellerman

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Victims

By Jonathan Kellerman

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Blood Test

By Jonathan Kellerman

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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.