Grade 4

Iceland is known as “the land of fire and ice.” This is because the island has around 200 volcanoes and about a tenth of its area is covered with glaciers. The colors of the national flag… More →

Lush landscapes may be scarce in Saudi Arabia, but oil and sacred sites are not. Oil has made Saudi Arabia one of the wealthiest nations in the world, and the cities of Mecca and Medina… More →

Lumberjacks use chainsaws, helicopters, and heavy machinery to cut down trees and bring them to the mill. When a massive tree comes down, everyone is at risk. Readers will learn about the… More →

The United States Army deploys its Rangers wherever quick, efficient action is needed. This can include seizing an enemy structure, rescuing hostages, or protecting civilians. Rangers have… More →

In Belgium, you will find the world's diamond capital, world-famous chocolates and waffles, and countless castles. You will also notice a global presence, as the headquarters for several… More →

The earliest canoes were merely hollowed-out tree trunks. These gave way to birch bark canoes and, later on, wood-and-canvas canoes. Today there are racing canoes, inflatable canoes, and even More →

Mastery of casting techniques is essential in fly fishing, where a weighted line is required to cast the nearly weightless artificial fly. This book explores the different approaches to fly… More →

Predator drones can be used for reconnaissance missions or targeted attacks. Pilots control the drones from remote locations, keeping them safe from enemy fire. These unmanned aerial vehicles More →

Dogs may be man's best friends. However, you shouldn't try to befriend dingoes. Once these wild dogs lose their fear of humans, they can become savage attackers. They will snarl and bite to… More →

Named after General Creighton Abrams, the Abrams tank is the main battle tank of the United States Army. Its powerful main gun, composite armor, and large engine make it one of the most… More →

The Green Berets are a Special Forces unit of the United States Army. They carry out a variety of missions, including search-and-rescue, counterterrorism, and strategic assaults on enemy… More →

Trespassing in mountain lion habitat is a dangerous idea. Mountain lions do not share their territory, and they will not hesitate to stalk, pounce, and bite to defend it. Read about people… More →