Did you know that a problem can have many different solutions? Read about how an engineer finds the best solution to solve a problem or meet a need. More →

The executive branch of the United States government is responsible for putting laws into action. This book carefully explains the workings of the executive branch, from its most visible… More →

The judicial branch of government consists of the nation's courts. This title explores the role of the United States Supreme Court and its role in interpreting the U.S. Constitution, as well… More →

The legislative branch of the United States government represents the people and makes the laws which they live by. This book introduces readers to the House of Representatives and Senate,… More →

What is the Rock Cycle describes the natural transformation of one type of rock into others. Beginning with igneous rocks made in volcanic eruptions, rock is weathered and eroded gradually to More →

Charles Darwin is known as the father of evolutionary biology. This engaging title examines how Darwin developed his controversial theory of evolution, including his research methods and the… More →

In 1912, German meteorologist Alfred Wegener published his groundbreaking theory of continental displacement. His theory proposed that the continents were once a single land mass but had… More →

Is it smooth or rough? Is it hot or cold? Is it sharp or dull? Our sense of touch helps us learn about the things around us. This engaging title uses captivating images and accessible text to More →

This book carefully explains how countries around the world engage in trade. Whether it is a detailed description of how countries negotiate trade agreements, how countries use tariffs to… More →

Weather changes from day to day and season to season. But what exactly is weather and how is it created? Readers will discover the answers to these questions and many other weather wonders.… More →