The play "The Book That Saved The Earth" is set in the 25th century and depicts a Martian invasion of Earth that is thwarted by a book of nursery rhymes. The mighty Think-Tank leads a Martian expedition to Earth to assess the planet's defenses. Upon arriving at a library, Think-Tank and his crew misunderstand books and attempt to eat and listen to them before realizing they contain written language. When Oop reads from Mother Goose to Think-Tank, he becomes terrified of the Earthlings and orders an immediate retreat from the invasion to save himself.