Dorothea Jensen Books

The riddle of Penncroft Farm

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Lars Olafson's move to a farm near Valley Forge brings him friendship with the ghost of an eighteenth-century ancestor, who recounts for him his adventures in that part of Pennsylvania during the A...

The Riddle of Penncroft Farm

By Dorothea Jensen

Average: 0.00, 0 Ratings

Twelve-year-old Lars Olafson's move to his great-aunt's farm near Valley Forge, Pennsylvania, brings him friendship with the ghost of an eighteenth-century ancestor who recounts his adventures duri...

The riddle of Penncroft Farm

By Dorothea Jensen

Average: 0.00, 0 Ratings

Lars Olafson's move to a farm near Valley Forge brings him friendship with the ghost of an eighteenth-century ancestor who recounts his adventures during the American Revolution.

The Riddle of Penncroft Farm

By Dorothea Jensen

Average: 0.00, 0 Ratings

The Riddle of Penncroft Farm

By Dorothea Jensen

Average: 0.00, 0 Ratings

Riddle of Penncroft Farm

By Dorothea Jensen

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Liberty Loving Lafayette

By Dorothea Jensen

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The Riddle of Penncroft Farm Great Episodes

By Dorothea Jensen

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Blizzy the Worrywart Elf

By Dorothea Jensen

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Buss From Lafayette Teacher s Guide

By Dorothea Jensen

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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.