Grade 4

It was an Earth satellite that started the space race between Russia and the United States. Russia sent Sputnik 1 into space in 1957, and the U.S. responded with Explorer 1 in 1958. In this… More →

Every great animal predator has a secret weapon. The crocodile opens toothy jaws. The harpy eagle grabs and crushes prey with strong talons. The boa constrictor uses its body to coil and… More →

From the start, American Girl has cared about representing diversity with its dolls. Its original young girl dolls—Samantha, Kirsten, and Molly—were introduced at a time when it was difficult More →

After years off the production line, the Dodge Charger R/T reappeared in 2005, in a much different form. The coupe of the 1960s became the sedan of today. In this book, young car enthusiasts… More →

Venus flytraps, pitcher plants, and sundews are all examples of nature's insect traps. They use their sugary nectar to lure prey to them, before each carries out a unique killer plan of… More →

Scientists estimate that about 500,000 detectable earthquakes shake the earth each year. But the majority of them go unnoticed, as most register at the bottom of the 8.0+ magnitude scale. In… More →

The Lykan HyperSport is a car with a big price tag. It sells for more than $3 million! One reason for the high cost is that diamonds, sapphires, rubies, or emeralds are placed in the… More →

Every fire has three ingredients: heat, fuel, and oxygen. And when these ingredients mix inside a house or in a forest, they are often a recipe for danger. This survival guide for young… More →

The Ford Mustang Shelby GT350 was named for its creator, Carroll Shelby. This American racecar driver of the 1950s designed this Ford model to maximize speed and power on the track. This… More →

Aston Martin supercars have celebrity status. Many models in the DB line have starred with British Secret Service Agent 007 in James Bond films. In this title, readers with a passion for cars More →

Barbie is popular enough to be recognized by her first name alone. But does Barbie have a last name? In this book, fluent readers can find the answer to that question while discovering other… More →

The leafy sea dragon and other masters of camouflage blend in so well with their surroundings that they become nearly invisible. Inflatable animals like the puffer fish blow up to the point… More →