This is a dark, dark novel. And it’s almost on the edge of science fiction and into the realm of human psychology or social satire, à la Brave New World or Lord of the Flies or even The Road. The contemporary setting, even after the contemporary characters are thrust into the future, makes everything seem a little more rough and real than it might otherwise be.
Despite this, I could not put it down. Read my full review of Farnham’s Freehold to see that Heinlein might still have (if you haven’t read it all yet) a few surprises in his bibliography.