Robert Maass Books

Arthur's Chicken Pox: An Arthur Adventure

By Marc Brown

Average: 0.00, 0 Ratings

Arthur the aardvark catches chicken pox a week before he is supposed to go to the circus.

Doctor De Soto Spanish Edition

Average: 0.00, 0 Ratings

I want to be a fire fighter

By Edith Kunhardt

Average: 0.00, 0 Ratings

A little girl whose father is a volunteer fire fighter tells about his work and her own ambitions to fight fires.

A Is For Autumn

By Marcia Thornton Jones, John Steven Gurney, Debbie Dadey, Robert Maas, Robert Maass

Average: 0.00, 0 Ratings

Brief text and lavish illustrations explain plant reproduction and the purpose of a flower and present some plants which don't seem to be flowers but are.

Fire fighters

By Robert Maass

Average: 0.00, 0 Ratings

Describes what it means to be a firefighter, including life at the firehouse, practice drills, service to the community, and fire emergencies.

Martin and the tooth fairy

By Bernice Chardiet

Average: 0.00, 0 Ratings

When Martin receives more money from the Tooth Fairy than his friends at school, he offers to put their teeth under his pillow for a percentage of the profits.

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.