Robert Ludlum Books

Robert Ludlum's The Lazarus vendetta

By Robert Ludlum

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The Tristan betrayal

By Robert Ludlum

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Robert Ludlum's The Lazarus vendetta

By Robert Ludlum

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The Bancroft strategy

By Robert Ludlum

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"Todd Belknap, a legendary field agent for Consular Operations with a reputation as a cowboy, is cut loose from the agency after an operation goes wrong. At the same time, Jared Rinehart, his best...

The Ambler warning

By Robert Ludlum

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The Cassandra compact

By Robert Ludlum

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The Matarese countdown

By Robert Ludlum

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Robert Ludlum's the Hades factor

By Robert Ludlum

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Robert Ludlum's the Hades factor

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.