Man Who Sold the Moon / Orphans of the Sky

From the back cover:

***The Man Who Sold The Moon***

D.D. Harriman is a billionaire with a dream: the dream of Space for All Mankind. The method? Anything that works. Maybe, in fact, Harriman goes too far.

But he will give us the stars...

***Orphans of the Sky***

Hugh had been taught that, according to the sacred writings, the Ship was on a voyage to faraway Centaurus. But he also understood that this was allegory for a voyage to spiritual perfection. Indeed, how *could* the Ship move, since its miles and miles of metal corridors were all there was of creation. But then he discovered the truth....