Title: Man Who Sold the Moon / Orphans of the Sky
Description: 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....
Subjects: American Science fiction, FICTION / Science Fiction / General, FICTION / Science Fiction / Adventure, FICTION / Science Fiction / Space Opera, Fiction, science fiction, general, Interplanetary voyages, Fiction, Space ships, Conspiracies