Raul Guisado Books

Surfing California

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"Surfing California is your one-of-a-kind guide to more than 200 of the best breaks in the Golden State - from classic surf spots to lesser-known waves. This revised and updated, full-color guide n...

Crosstraining for Endurance Athletes

By Raul Guisado

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California Sports Trivia

By Raul Guisado, J. Alexander Poulton

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The art of surfing

By Raul Guisado

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Art of Surfing 2nd

By Raul Guisado

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Art of Surfing

By Raul Guisado

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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.