Gregor Clark Books

Costa Rica

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"Discover the freedom of the open road." Loire Valley: Bring history to life with a tour of the region's castles. Provence: Discover the finest cuisine and a different pace of life. The Alps: Incre...

Discover France

By Nicola Williams

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France

By Nicola Williams

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Full Colour, pull out sheetmap. Illustrated highlights cover Notre Dame, the Louvre, Versailles, Monte Carlo Casino, Marseilles Vieux Port, Mont St Michel.The plan. section features the following:...

Montreal Quebec City

By Regis St. Louis

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Lonely Planet Brazil

By Kevin Raub, Mara Vorhees, Gregor Clark, Regis St. Louis, John Noble, Gary Chandler, Robert Landon

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Lonely Planet Cycling Italy Lonely Planet Cycling Guides

By Gregor Clark, Will Marinell, Ethan Gelber, Quentin Frayne

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Lonely Planet Argentina Lonely Planet Argentina Uruguay and Paruguay

By Danny Palmerlee

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Portugal

By Regis St. Louis

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Discover Portugal. Catch a waft of cool air and a mournful song in Lisbon's labyrinthine Alfama. Splash into the clear waters at the Algarve's pristine Praia da Arrifana. Savor the silky texture an...

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.