Harris Robert Books

Spisek

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The year is 63 BC. In an age of political titans, Cicero stands supreme: the senior consul of the Roman republic. But jealous rivals are determined to destroy him and seize control of the state. To...

Enigma

By Harris Robert

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Conspirata

By Harris Robert

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Conspirata

By Harris Robert

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Dictator

By Harris Robert

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There was a time when Cicero held Caesar's life in the palm of his hand. But now Caesar is the dominant figure and Cicero's life is in ruins. Exiled, separated from his wife and children, his posse...

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.