Robert Graysmith Books

The girl in Alfred Hitchcock s shower

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The Girl in Alfred Hitchcock's Shower

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Marli Renfro was Janet Leigh's body double in the Hitchcock classic Psycho. When she disappeared, it was believed she was the victim of a serial killer. It was a mystery that took decades to solve-...

Amerithrax

By Robert Graysmith

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Zodiac

By Robert Graysmith

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Robert Graysmith’s New York Times bestselling account of the desperate hunt for a serial killer and his own investigation of California’s unsolved Zodiac murders. A sexual sadist, the Z...

Amerithrax

By Robert Graysmith

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Zodiac

By Robert Graysmith

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Amerithrax

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Amerithrax

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Amerithrax

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The Laughing Gorilla

By Robert Graysmith

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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.