The world is full of unanswered questions! Examine some of the top secrets and unsolved mysteries in history with this spooky series. Readers will gather facts and learn from researchers as… More →

Have you seen a Bigfoot or heard rumors that Elvis is alive? People believe in all sorts of tall tales. But how can we know what is totally true? We use the scientific method! It's easy to… More →

Trucks are powerful vehicles that help accomplish many tasks! Some work in construction while others work in the military or help in emergencies. Readers will see trucks they recognize and… More →

The English language is filled with colorful idioms--but what do these phrases really mean? Our series presents dozens of common idioms and explains what they mean. Entries show how to use… More →

The United States is steeped in rich history and continues to evolve today. In the United States Encyclopedias series, readers will learn about the history of the US government and how it… More →

Are we alone in the universe? What's inside our planet's core? Why do we dream? The world of science is filled with unanswered questions. Dive into the unknown and discover how scientists are More →

From land and sea to space, at home, and around the world, the U.S. Armed Forces defend and serve the American people. How do they train? What are their coolest tools and technologies? Here's More →

This series examines the knock-down drag-out feuds of some of today's top companies in a thrilling and informative way. Explore the prickly relationships between popular businesses like… More →

This series includes the vowel blends ai, ea, ee, oa, oo, and ou. Each easy reader features and highlights a vowel blend used in common words and children's names and is complete with… More →

This world can be strange, absurd, baffling, inexplicable, and downright wacky. Learn about some of the wildest things from making clothing out of old milk to staying in bed for… A com More →