Authentic photographs help bring to life the early days of The Railroad, a revolution in travel that quickly replaced the wagon train as the fastest, cheapest means to reach the North… More →

Huff and Puff, our Body Buddy lung twins explain how the lungs and respiratory system function. Readers are introduced to the bronchial tree. They discover how the diaphragm and intercostals… More →

Learn how the European Renaissance came to be! See those most notably involved in this fascinating era. Take a look inside a typical Renaissance home. Follow along as great strides were made… More →

Steamships, locomotives, and the airplane - these machines revolutionized the world. The Revolution in Industry takes a look at how these and other machines changed history. Young readers… More →

The Rhine River begins in the Swiss Alps and flows through central Europe before reaching the Netherlands, where it empties into the North Sea. This engaging book highlights this major… More →

Some objects must be made of certain kinds of materials to make them work the way they should. Read about how the properties of different materials, such as their hardness or weight, help… More →

What does voting mean? Who can vote? Young Americans will find the answers in this early civics book that will help them understand how their country works. Downloadable Teacher's Notes available. More →

The Robotx are two small robots - RobbO and RobbEE - who spend their days exploring the technology of simple machines - and creating their own. Playful text and funny illustrations support… More →

The history of human activity in the Rocky Mountain range is as colorful as its scenic natural wonders. It has been witness to the decimation of Native peoples, the westward expansion of… More →

This informative book describes how the Muslim religion started, including the life of the Prophet Muhammad; the Hegira and Kaaba; caliphs; the split of the Sunni and Shi'a and the beliefs of More →