Roger Duvoisin Books

Petunia, Beware!

By Roger Duvoisin

Average: 0.00, 0 Ratings

Petunia's Christmas.

By Roger Duvoisin

Average: 0.00, 0 Ratings

The Happy Lioness

By Louise Fatio

Average: 0.00, 0 Ratings

While the Happy Lion is at the animal hospital, the Happy Lioness receives help from her friends in attracting visitors who only like to see a lion with a full mane.

Hector and Christina

By Louise Fatio

Average: 0.00, 0 Ratings

Hector the Penguin is captured and forced to live in a zoo where he falls in love with another penguin named Christina.

The House of Four Seasons.

By Roger Duvoisin

Average: 0.00, 0 Ratings

Marc and Pixie

By Louise Fatio, Roger Duvoisin

Average: 0.00, 0 Ratings

House of the Four Seasons

By Roger Duvoisin

Average: 0.00, 0 Ratings

House of the Four Seasons

By Roger Duvoisin

Average: 0.00, 0 Ratings

Petunia takes a trip

By Roger Duvoisin

Average: 0.00, 0 Ratings

Petunia

By Roger Duvoisin

Average: 0.00, 0 Ratings

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.