Jonathan Kellerman Books

A woman doctor is murdered in Los Angeles, her death predicted by the mumbling of a killer while in a drugged state. But the killer is locked in an asylum, he therefore must have an accomplice on t...

Dr. Death

By Jonathan Kellerman

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Flesh and Blood

By Jonathan Kellerman

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Years after failing to help troubled teen-turned-stripper Lauren Teague, psychologist Alex Delaware ignores the advice of friends to solve her murder, delving into the victim's past and the sex ind...

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.