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 →

Do you wonder about the planet we call home? Do you know why water is one of the most valuable resources on Earth? Can you explain how the power of water shapes and changes the land? In this… More →

This fascinating book describes the geological makeup and history of the Sahara Desert in North Africa. The biggest hot desert on Earth, it covers parts of twelve countries - more area than… More →

In 1692, two young girls in Salem, Massachusetts, were diagnosed by the local doctor as being bewitched. Hysteria over witchcraft reached a fever pitch leading the Puritan townsfolk to accuse More →

The scale of things means how one thing compares in size to another. In this book, appealing illustrations help kids understand scale by comparing many different kinds of animals by their… More →

The scale of things means how one thing compares in size to another. In this book, appealing illustrations help kids understand scale by comparing famous buildings and structures by their height. More →

The scale of things means how one thing compares in size to another. In this book, appealing illustrations help kids understand scale by comparing many different kinds of dinosaurs by their… More →

The scale of things means how one thing compares in size to another. In this book, appealing illustrations help kids understand scale by taking them around the world - and even into space -… More →