Harlan Hague Books

The road to California

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"Attempting to fill an empty space in western literature, this book then is concerned with the search for and use of the southern overland route to California from the earliest Spanish penetration...

The people

By Harlan Hague

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"In this retelling of the frontier story, the western tribes put aside ancient enmities and form a confederation to oppose the invasion of their lands by the American army and settlers. The confe...

Thomas O. Larkin

By David J. Langum, Harlan Hague

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Thomas O. Larkin

By Harlan Hague, David J. Langum

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Kind der Madame Butterfly

By Mignon Nagel Selb, Harlan Hague

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Sieben Arten in Belize Zu Sterben

By Manuela Schneider, Harlan Hague

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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.