Caroline Trefler Books

Fodor s 2012 Spain

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A travel guide to Spain that provides maps, travel itineraries, planning tips, photographs, and ratings of hotels, restaurants, shops, and popular sights.

Fodor s Moscow and St. Petersburg

By Caroline Trefler

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Two cities with real Tsar Power, Moscow and St. Petersburg are the odd couple of Russia: one, the heart of the nation and home to the history-rich Kremlin, where rulers from Ivan the Terrible to Le...

Fodor s Rome with the Best City Walks Scenic Day Trips Full color Travel Guide

By Fodor S Travel Guides

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Fodor s 2011 Spain

By Caroline Trefler

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"Fodor's Spain 2010" covers everything visitors love about this popular tourist destination--captivating culinary experiences, spectacular beaches and islands, red-hot nightlife, and mountains for...

Essential India

By Caroline Trefler

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Covering such destinations as Delhi, Rajasthan, the Taj Mahal, and Mumbai, this Gold Guide to India contains dazzling full-color photos, detailed maps, and illustrated features sure to provide visi...

Fodor s Canada 29th Edition

By Rachel Klein, Caroline Trefler, Fodor S, Joanna G. Cantor

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Austria

By Caroline Trefler

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Fodor s Paris 2010

By Caroline Trefler

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Detailed information on accommodations, restaurants, and local attractions highlight this updated travel guide, which feature symbols to indicate budget options, must-see ratings, multi-day itinera...

Fodor s 2010 Spain

By Fodor S

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"Fodor's Spain 2010" covers everything visitors love about this popular tourist destination--captivating culinary experiences, spectacular beaches and islands, red-hot nightlife, and mountains for...

Fodor s Arizona and the Grand Canyon 2006

By Fodor S

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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.