When his fortune cookie cracks open and a tiny pink alien steps out, Richard Bickerstaff knows that he's in for more than a Chinese dinner. And he's right! Aric, that bossy extraterrestrial, needs Richard's help. He's got to keep pollution-loving aliens from turning Earth into a Toxic Waste Theme Park. The trouble is, they've already started, and they're moving fast! Can Richard and Aric stop the total trashing of the planet? Kids will love this very...

The Magic Tree House takes Jack and Annie to a moon base in the future where they continue to search for the fourth thing they need to free their friend Morgan from the magician's spell.

"Prepare to learn all about Earth from the point-of-view of Earth herself, [discovering] key moments in Earth's life from her childhood more than four billion years ago all the way up to present day"

Frannie tries to prevent chaos when her new lab assistant, Igor, a dog of many breeds, accidentally lets loose a giant, fifty-foot, arrow-shooting cupid.

Simple text and photographs present military tanks, their parts, and their crew.

Commander Toad and his spaceship Star Warts answer a mysterious call for help from a flooded asteroid.

Includes brief discussions and experiments about force and motions, gravity, magnets, energy and motion, wheels, pulleys, and gears.

As life on Mars becomes impossible, Martians and their terrifying machines invade the earth.

Fergus and Zeke love being the class pets in Miss Maxwell's classroom, and they do everything the students do--listening at storytime, painting masterpieces during art class, and keeping their own special journals. But when it's time for the school science fair, the mice aren't sure just how to get involved. Lucy wants to time them as they run through a maze, but they want to do an experiment, not be an experiment. Then Zeke comes up with a great...

The Wump World is an unspoiled place until huge monsters bring hordes of tiny creatures from the planet Pollutus.