Marcus Tullius Cicero Books

De Finibus Bonorum et Malorum Libri V

By Marcus Tullius Cicero

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Selected Works (Cicero, Marcus Tullius)

By Cicero

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Collecting the most incisive and influential writings of one of Rome's finest orators, Cicero's Selected Works is translated with an introduction by Michael Grant in Penguin Classics.Lawyer, philos...

Selected Political Speeches

By Cicero

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As the Roman Republic lurched to its close, amid corruption, ruthless power struggles and gross inequality, Cicero produced some of the most stirring and eloquent speeches ever written. Whether he...

On the Good Life

By Cicero

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For the great Roman orator and statesman Cicero, 'the good life' was at once a life of contentment and one of moral virtue - and the two were inescapably intertwined. This volume brings together a...

The Nature of the Gods

By Cicero

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Murder Trials

By Cicero

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"Whereas the place for prejudice is a public meeting, a court of law is the adobe of truth." Cicero was still in his twenties when he got Sextus Roscius off a charge of murdering his father and n...

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.