Stephen Hawking (Getting to Know the World's Greatest Inventors & Scientists)

Albert Einstein: Universal Genius (Getting to Know the World's Greatest Inventors and Scientists)

Marie Curie: Scientist Who Made Glowing Discoveries (Getting to Know the World's Greatest Inventors & Scientists)

Thomas Edison: Inventor with a Lot of Bright Ideas (Getting to Know the World's Greatest Inventors & Scientists (Paperback))

George's Secret Key to the Universe

The Wright Brothers: Inventors Whose Ideas Really Took Flight (Getting to Know the World's Greatest Inventors and Scientists)

Jane Goodall: Researcher Who Champions Chimps (Getting to Know the World's Greatest Inventors and Scientists)

Alexander Graham Bell: Setting the Tone for Communication (Getting to Know the World's Greatest Inventors & Scientists (Paperback))

Henry Ford: Big Wheel in the Auto Industry (Getting to Know the World's Greatest Inventors & Scientists (Paperback))

George's Cosmic Treasure Hunt (George's Secret Key)