Learn about the brave people who make their living protecting their fellow citizens in this essential police force careers guide. Detailed bios and descriptions of operations and incidents… More →

Police officers are the protective barrier standing between the public on one side and lawlessness on the other - the so-called "thin blue line." A high-stress job, officers face daily… More →

Political Leaders chronicles the dramatic achievements of female political leaders from around the world. Countries, cultural traditions, and ideas explored include the role of Muslim women,… More →

Political maps are often the first kind of maps children learn about. These maps identify the boundaries of countries, states or provinces, and cities, as well as such physical features as… More →

Pollution is seriously damaging our planet. Human activity and waste are harming the environment by polluting the air, water, and land. Discover the facts about where pollution comes from,… More →

Peter and Vicki have just moved into their new apartment in Chicago, Illinois. With time to kill before the moving truck arrives, they visit nearby Lincoln Park Zoo. Before long, strange… More →

This captivating title examines the eruption of Mt. Vesuvius that destroyed Pompeii in 79 A.D. and what the remnants of this buried city can teach us today. More →

Famous for his search for the legendary Fountain of Youth, Spanish conquistador Ponce de León is credited with the discovery of Florida in 1513 as well as making Puerto Rico and the Gulf… More →

Learn about population in countries around the world, and how changes in the number, age, and gender of people living in a place affect life there. Explore different settlements, from ancient More →

Why do people migrate to and settle in the places they do? Fascinating examples in history help explain how the earliest human settlements were situated close to fertile ground and rivers for More →