Two worlds--Ætheria, a stratospheric complex mostly devoid of oxygen; and Cthonia, a terrestrial civilization thriving on fungus and ground water. Both places go ignored until one world…

Press start and jump into action with today's most popular video game heroes from games like Super Mario Bros, Pokémon, and Sonic the Hedgehog! Thrilling spreads and exciting, simple text…

Press start and jump into action with today's most popular video game heroes like Pac-Man, Donkey Kong, and Naruto! Thrilling spreads and exciting, simple text will delight young readers…

Superheroes and villains have always been enemies. But after coming together to save the world from a global threat, they form the coalition All One to unite them for good. But not everyone…

Volcanoes have been erupting on Earth since the planet's beginnings. But what causes volcanoes to erupt? Where does magma come from and how does it get to Earth's surface? And what are the…

America's wars have been some of the deadliest and most devastating events in the nation's history. Yet each armed conflict also spurs the development of incredible new technologies. With…

From clouds to the water cycle, this series introduces basic facts about weather for early elementary students. Critical thinking questions invite students to connect what they learn about…

Our planet is filled with weird and wonderful creatures. This fascinating series investigates the habitats, adaptations, life cycles, and behaviors of some of Earth's most interesting…

The lore has existed for centuries, passed on and reinterpreted through generations as folktales, and urban legends--stories of uncontrollable beasts, disguised remnants of an ancient evil…

Dive into Earth's oceans and discover the world's whales! Stunning, full-color photos show these impressive animals above water and below. Range maps reveal where these special cetaceans can…

Dive into Earth's oceans and discover the world's whales! Stunning, full-color photos show these impressive animals above water and below. Range maps reveal where these special cetaceans can…

Help make the world a better place! The What We Stand For series instills young readers with essential values and teaches them the importance of standing up for ideals like generosity,…