Jonathan Kellerman Books

Bad Love

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NEW YORK TIMES BESTSELLER 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 chant...

Monster

By Jonathan Kellerman

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Alex Delaware is back! With a riveting and devilishly ingenious story about an asylum inmate who seems able to predict grisly slayings in the outside world. How can a nonfunctional psychotic locked...

Deception

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Her name is Elise Freeman, and her chilling cry for help comes too late to save her. On a DVD found near her lifeless body, the emotionally and physically battered woman chronicles a long ordeal of...

Victims

By Jonathan Kellerman

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"Unraveling the madness behind L.A.'s most baffling and brutal homicides is what sleuthing psychologist Alex Delaware does best. And putting the good doctor through his thrilling paces is what myst...

Victims

By Jonathan Kellerman

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“With his latest, [Jonathan Kellerman] not only brings his ‘A’ game but also ratchets it up a notch or three. . . . Victims will keep you up at night.”—Bookreporter Acid-tongued Vita Berlin hadn’...

Killer

By Jonathan Kellerman

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"Well-used to elevated emotions, psychologist Alex Delaware shrugs off a joking death threat from beautiful Beverly Hills physician Constance Sykes, whose attempt to secure legal custody of her bab...

Devil's Waltz

By Jonathan Kellerman

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NEW YORK TIMES BESTSELLER In one of the most frightening and challenging cases of his career, Dr. Alex Delaware must confront a strange medical mystery involving a child. “Reads like wildfire ....

When the Bough Breaks

By Jonathan Kellerman

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NEW YORK TIMES BESTSELLER Dr. Morton Hander practiced a strange brand of psychiatry. Among his specialties were fraud, extortion, and sexual manipulation. Hander paid for his sins when he was bru...

A Cold Heart

By Jonathan Kellerman

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NEW YORK TIMES BESTSELLER LAPD homicide detective Milo Sturgis summons his friend psychologist-sleuth Alex Delaware to a trendy gallery where a promising young artist has been brutally garroted o...

The Conspiracy Club

By Jonathan Kellerman

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NEW YORK TIMES BESTSELLER When his passionate romance with nurse Jocelyn Banks is cut short by her kidnapping and brutal murder, young psychologist Jeremy Carrier is left emotionally devastated,...

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.