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The Martian Commander-in-Chief with an inflated ego and an egg-shaped head
Think tank
Think Tank's apprentice, who cleverly corrects his mistakes without offending him
Noodle
The Martin Commander in Chief, who definitively declared the books to be a form of Earth's food
Think Tank
The Captain of the Martian space probe to Earth (Probe One)
Omega
The destination Think Tank ordered his fleet to evacuate to, a hundred million miles away
Alpha Centauri
The type of book that ultimately saved Earth from the Martian invasion
Rhymes
The specific book title that Think Tank misunderstood as a "coded manual"
Mother Goose
The object that Think Tank initially mistook the books to be
Sandwiches
The device the Historian uses to show the past event of the Martian Invasion
Historiscope
The building on Earth where the Martian crew landed and found the books
Library
The century that the Historian calls the "Era of the Book"
Twentieth
The planet the invaders were from
Mars
The century in which the story's events (the invasion plan) took place
Twenty first
The year of the planned Martian invasion
2040
The century in which the play's narration by the historian is set
twenty fifth century
The precious metal that Think Tank mistook for a crop Earthlings could grow in the "Mistress Mary" rhyme
Silver
The celestial body that the cow was said to have jumped over in the "Hale Diddle Diddle" rhyme
moon
The creature whose picture greatly resembled Think Tank and caused his final panic
Humpty Dumpty
The first of Think Tank's mistaken ideas about how Earthlings used books (after the "sandwich" idea)
Communication
What the Martians took to increase their intelligence to understand the book
vitamins
The emotion that ultimately made Think Tank abandon the invasion
fear
The general name Think Tank used for the inhabitants of Earth
Earthlings
The writer of the play, "The Book That Saved the Earth"
Claire Boiko
The character who eventually replaced Think Tank as the ruler of Mars
Noodle
The character who suggested the books was for "Eye Communication"
Noodle