Lorraine F. McConnell Books

Machu Picchu

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Describes the discovery in 1911 of the Peruvian ruins called Machu Picchu and presents the various theories of the function of this city in the ancient Inca civilization.

Mysterious sunken treasures

By Lorraine F. McConnell

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Overviews the development of diving techniques and equipment that have enabled searchers to locate sunken treasure from such vessels as the Spanish galleon "Atocha," lost in a hurricane in 1622.

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.