Darwin Porter Books

Frommer s Italy 2006

By Darwin Porter

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Frommer s Italy 2007 Frommer s Complete

By Danforth Prince, Darwin Porter

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Frommer s Bermuda 2007 Frommer s Complete

By Danforth Prince, Darwin Porter

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Come along with Frommer's as we explore the highlights and hidden pleasures of Portugal, one of Europe's best bargain destinations. We'll show you the best of Lisbon, including the winding alleyway...

Frommer s Guide to Paris 1983 1984

By George McDonald

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Scandinavia on 25 Day 8 28877

By George McDonald

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Frommer s France 1996 1997

By Darwin Porter

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Frommer s Comprehensive Travel Guide Italy 1996

By Darwin Porter

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Italy Frommer s Comprehensive Travel Guides

By Darwin Porter, Haggart

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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.