Darwin Porter Books

Frommer s Austria

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This guide contains up-to-date coverage of all of Austria's highlights, with candid, detailed reviews of the very best dining and accommodations; accurate color maps; and insider tips on shopping.

Frommer s Vienna the Danube Valley

By Darwin Porter

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Frommer s Seville Granada the best of Andalusia

By Darwin Porter

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Scandinavia

By Darwin Porter

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Denmark

By Darwin Porter

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Cayman Islands

By Darwin Porter

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Frommer s Bermuda 2010

By Darwin Porter

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Frommer s Bahamas 2010

By Danforth Prince, Darwin Porter

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Paris 2010

By Darwin Porter

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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.