Regis St. Louis Books

Discover New York City

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Lonely Planet's Discover New York City is your passport to the most relevant, up-to-date advice on what to see and skip, and what hidden discoveries await you. Pay a visit to Lady Liberty, explore...

Lonely Planet Brazil

By Regis St. Louis, Thomas Kohnstamm, Molly Green, Andrew Draffen

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Barcelona

By Regis St. Louis

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Best of New York City 2019

By Regis St. Louis, Ray Bartlett, Ali Lemer, Lonely Planet Publications Staff, Robert Balkovich

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St Petersburg

By Regis St. Louis

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Built on a swamp, the imperial capital is today a dazzling metropolis whose sheer grandeur never fails to amaze. Despite all that history has thrown at it, St Petersburg still feels every bit an im...

Brazil

By Matthew Shirts, Regis St. Louis

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Ecuador y las Islas Galapagos

By Regis St. Louis

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Colonial cities, misty cloud forests, towering Andean peaks, Amazonian rainforest and the otherwordly Galápagos - for such a small country Ecuador has a stunning array of natural and cultural wonde...

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.