Final answer:
In the chapter "The Book that saved the Earth", an ordinary book of rhymes is shown to have the potential to save humanity.
Step-by-step explanation:
In the chapter "The Book that saved the Earth", the message is that even an ordinary book of rhymes has the potential to save humanity. The story is set in a time when a spaceship filled with aliens is about to destroy Earth, but they come across a book of nursery rhymes. The aliens are so captivated by the book that they decide to spare Earth. This shows that even something as simple as a book can have a profound impact and save humanity.
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