Robert Ludlum Books

The Hades Factor

By Gayle Lynds, Robert Ludlum

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The Prometheus Deception: A Novel

By Robert Ludlum

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Nicholas Bryson, an agent for a covert American group called the Directorate, comes out of retirement after learning the Directorate is actually a traitorous group and joins forces with the CIA to...

The Sigma Protocol: A Novel

By Robert Ludlum

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The Janson Directive: A Novel

By Robert Ludlum

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After his quiet life away from U.S. Consular Operations is disrupted by the terrorist kidnapping of Peter Novak, Paul Janson assembles a rescue team of former colleagues, only to find himself targe...

Robert Ludlum's The Hades Factor

By Robert Ludlum

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The Prometheus Deception

By Robert Ludlum

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The Cassandra Compact

By Philip Shelby, Robert Ludlum

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The Sigma Protocol

By Robert Ludlum

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The Cassandra Compact

By Robert Ludlum

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The Sigma Protocol

By Robert Ludlum

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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.