"The Moon is a Harsh Mistress" is a science fiction novel by Robert A. Heinlein, published in 1966. The story is set on a lunar colony in the year 2075, where the inhabitants, known as Loonies, struggle under the oppressive rule of the Earth government. The narrative follows a computer named Mike, a political activist named Manny, and a revolutionary named Wyoh as they plan a rebellion for lunar independence. The novel explores themes of freedom, self-governance, and the complexities of political systems. It presents a unique perspective on revolution and the challenges of creating a fair society, emphasizing the importance of individual rights and responsibilities.