Sandra Friend Books

Earth's hidden treasures

By Sandra Friend

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Explains what rocks, minerals, and gemstones are found on the earth and how they are used by people.

When The Earth Moves (Exploring Planet Earth)

By Sandra Friend

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Describes and explains the geological phenomena of earthquakes, landslides, sinkholes, quicksand, and avalanches.

Shaping The Earth

By Sandra Downs, Sandra Friend

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Examines the different forces of erosion, such as wind, waves, acid rain, and glaciers, explains how they affect the topography of the earth, and describes their results, including dust storms, san...

Hiker s Guide to the Sunshine State Wild Florida

By Sandra Friend

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The Hiking Trails of Florida s National Forests Parks and Preserves

By Johnny Molloy, Sandra Friend

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50 Hikes in Central Florida

By Sandra Friend

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50 Hikes in North Florida

By Sandra Friend

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South Florida

By Kathy Wolf, Sandra Friend

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North Florida the Florida Panhandle An Explorer s Guide

By Kathy Wolf, Sandra Friend

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Explorer s Guide Orlando Central Florida Explorer s Complete

By Kathy Wolf, Sandra Friend

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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.