Second Foundation is the third book in Isaac Asimov's classic science-fiction masterpiece, the Foundation series. The novel narrates the story of a secretly developed Second Foundation, which exists to protect the first from the threats of a deadly mutant and a corrupt First Foundation seeking control of the galactic empire.

The fate of the Foundation rests upon young Arkady Darell, a fourteen-year-old girl burdened with a terrible secret. As the scientists prepare for a final showdown with the Mule, the survivors of the First Foundation embark on a desperate search. They, too, wish to find and destroy the Second Foundation before it has the chance to destroy them.

Unforgettable and thought-provoking, Second Foundation is a tale of adventure and ideas that spans the Galaxy. It is a powerful narrative about humankind's struggle to preserve the fragile light of wisdom against the threat of its own dark barbarism.