Lois Walfrid Johnson Books

The Hidden Message

By Lois Walfrid Johnson

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Escape Into the Night

By Lois Walfrid Johnson

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Raiders from the Sea

By Lois Walfrid Johnson

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When Briana O’Toole rescues a stranger from drowning, she doesn’t realize that her actions may have put her family and neighbors in danger. Then, in one harrowing day, Viking raiders capture Bree a...

Mystery of the Silver Coins

By Lois Walfrid Johnson

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Bree and another young prisoner make a daring escape from the Viking ship. Soon they face a physical and spiritual battle for survival on a Norwegian mountainside. What will they eat? Where can the...

The Invisible Friend

By Lois Walfrid Johnson

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Deep in the Norwegian fjords the Viking ship comes to shore. Mikkel, the prideful young leader, is home, but Briana O’Toole faces a new, uncertain life. What will happen to her and the other Irish...

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.