Lois Walfrid Johnson Books

Mystery of the Silver Coins

By Lois Walfrid Johnson

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You're my best friend, Lord

By Lois Walfrid Johnson

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Answers questions about life and personal character asked by young girls.

Escape Into the Night

By Lois Walfrid Johnson

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The swindler's treasure

By Lois Walfrid Johnson

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In 1857, while working for the Underground Railroad on a Mississippi River steamboat, thirteen-year-old Libby hunts for the swindler who has robbed her father and tries to reunite the fugitive slav...

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.