Winner of the 1967 Hugo award, this novel marked Heinlein's partial return to his best form. He draws many historical parallels with the War of Independence, and clearly shows his own libertarian political views.

In what is considered one of his most hair-raising, thought-provoking, and outrageous adventures, the master of modern Sci-Fi tells the strange story of an even stranger world-Twenty-first century Luna, a harsh penal colony where a revolt is plotted between a bashful computer and a ragtag collection of maverick humans-a revolt that goes beautifully until the inevitable happens. But the problem with the inevitable is that it always happens.