George and the Big Bang

Who Was Neil Armstrong?

Uranus (Unabridged)

What Was the Hindenburg?

How to Get to Mars for Kids!

What Is a Solar Eclipse?

Exploring Dangers in Space: Asteroids, Space Junk, and More

Astronauts: A Space Discovery Guide

Cutting-Edge Space Tourism

What Do We Know About the Roswell Incident?

How Do Jets Work?

How Do Space Vehicles Work?

How Do Helicopters Work?

Exploring Exoplanets

Private Space Travel: A Space Discovery Guide

Mars Missions: A Space Discovery Guide

George and the Blue Moon

How Do Hang Gliders Work?

George's Secret Key to the Universe