John Maddox Roberts Books

SPQR IX: The Princess and the Pirates

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Dispatched to the Mediterranean to clear the sea of pirates, playboy detective Decius Caecilius Metellus is forced to humor an overenthusiastic Princess Cleopatra and decipher clues that hint at a...

The Princess and the Pirates

By John Maddox Roberts

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A Point of Law

By John Maddox Roberts

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S.P.Q.R. X: A Point of Law

By John Maddox Roberts

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SPQR XI: Under Vesuvius

By John Maddox Roberts

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SPQR XII: Oracle of the Dead

By John Maddox Roberts

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SPQR XII: Oracle of the Dead: A Mystery

By John Maddox Roberts

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SPQR XIII: The Year of Confusion: A Mystery

By John Maddox Roberts

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The strayed sheep of Charun

By John Maddox Roberts

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A typical American town

By John Maddox Roberts

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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.