Budding scientists will love learning about the properties of sound by planning and carrying out investigations that explore how the energy form is affected by material density, pitch, and distance. More →

Your digestive system is like a production line. Food, drinks, or pills travel through tubes, filters, and holding rooms, as body chemicals work to extract nutrients. This fascinating book… More →

The immune system is a large network of cells, tissues, and organs that work together, acting like a fort with guards to keep out risky viruses and bacteria and destroy invaders. Readers will More →

The control and command center of the whole body, we wouldn't be able to breathe, have a heartbeat, avoid danger, or sleep without the nervous system. Find out what illnesses affect the… More →

The average person takes 17,000 breaths per day. This fascinating book examines the mechanisms that make breathing work and the diseases that make breathing difficult. Full-color… More →

Investigative journalists interview sources and methodically work through documents and databases to uncover the truth about issues that affect us all. This important series details the… More →

Ancient religions, colorful dances, and sweet music all come alive in this fascinating, newly-revised book on Iran's culture. Learn how to celebrate the new year with the festival of Nowrouj, More →

This newly revised book provides a basic introduction to contemporary Iran-the land that was ancient Persia. With more than 45 full-color pictures, this book takes readers on a virtual walk… More →

Discover the rich and varied history of Iran through this amazing, newly-revised book. Ancient dynasties and modern revolutions are presented in an easy-to-read yet detailed manner.… More →

Know the culture of Iraq - from Mesopotamian to modern - as this war-torn country returns to its traditional ways, emerging from years of strife, oppression, and devastation. Read about the… More →