From stealth bombers to heat-seeking missiles, militaries around the world use cutting-edge technology to create powerful weapons. This hi/lo title...

We have all wondered about the possibility of intelligent life visiting Earth. But what if their intentions were to take over? With superior intell...

Apache helicopters are sometimes called "flying tanks." In this hi-lo title, readers will learn about the history and capabilities of this attack h...

As the oldest operating football team, the Cardinals have been around for a long time! The football franchise has city-hopped from Chicago to St. L...

Armor is an essential piece of a soldier’s uniform. But what kinds are being used, and how do they work? In this hi/lo title, leveled text and brig...

The Earth is constantly bombarded with space matter. Most burns up before it reaches the surface. But what if a giant asteroid was headed our way? ...

About 120,000 pounds of space dust falls to Earth every day. All of this dust comes from asteroids! Asteroids are chunks of rock and metal that orb...

A B-2 stealth bomber flies high up in the sky. Its stealth technology keeps it hidden from the enemy! In this hi-lo title, readers will learn what ...

The Baltimore Ravens are a young team, but they have a lot of heart! Standing strong and blocking opponents, their defensive linesmen are known as ...

Hashima, Japan’s sea walls give it the appearance of a ship lost at sea. This look is the reason for the Battleship Island nickname. In this title,...

The wild reputation of Bodie was unmatched in the Old West. The California gold-mining town attracted a rough crowd. Bodie had gamblers, drinkers, ...

Centaurs are the half-human, half-horse creatures known for making trouble. These mythical creatures are known from Greek mythology, but they conti...

When the Cleveland Browns joined the NFL, many of their opponents’ fans thought it was a joke. Little did they know that the Browns would crush the...

Increasing temperatures, rising sea levels, raging wildfires, and sweeping hurricanes: climate change is happening, but what if we donХt make chang...

What has a nucleus, coma, and two tails? Why, a comet, of course! The wonder and mystery of comets has excited humans for centuries, and they conti...

The coronavirus pandemic brought the world to a standstill. Billions of lives were impacted as the deadly virus spread around the globe. In this ti...

Craco’s historical happenings hint at a curse. The town faced a plague, then war, then earthquakes and landslides. In the end, the natural disaster...

One of the most successful franchises on and off the field, the Dallas Cowboys team is no stranger to the Super Bowl and division championships! Th...

Although the Detroit Lions haven’t had much luck in championships, they show courage and spirit on the field. They have produced some amazing star ...

Wings, claws, scales! What images come to mind when you think of a dragon? These amazing creatures have played important roles in many cultures for...

From reconnaissance missions to missile launches, military drones have a lot of jobs! In this hi/lo title, leveled text and crisp images explore th...

Edinburgh Castle’s 900-year-old history is riddled with murders and executions. Today visitors from all over the world tour the fortress. It’s no s...

The Super Hornet is a speedy fighter jet. It flies at supersonic speeds! In this hi-lo text, readers will learn what this high-powered military air...