Roger Smalley Books

The Aztecs

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Examines the birth, rise, and fall of the Aztec empire; its cultural practices and religious beliefs, including human sacrifice; and the Spaniards' eventual overthrow of the Aztecs.

The Aztecs

By Roger Smalley

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The Adventures Of Marco Polo Graphic History

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Dolley Madison saves history

By Roger Smalley

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The Adventures of Marco Polo Graphic Library Graphic History

By Roger Smalley

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Las aventuras de Marco Polo

By Roger Smalley

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Dolley Madison salva la historia

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Adventures of Marco Polo

By Roger Smalley

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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.