The Moon is a Harsh Mistress

It is a tale of revolution, of the rebellion of the former Lunar penal colony against the Lunar Authority that controls it from Earth. It is the tale of the disparate people—a computer technician, a vigorous young female agitator, and an elderly academic—who become the rebel movement's leaders. And it is the story of Mike, the supercomputer whose sentience is known only to this inner circle, and who for reasons of his own is committed to the revolution's ultimate success.