Movies don't have to be R-rated to be intense, as the likes of Star Wars: Revenge of the Sith, Captain Phillips, and The Zone ...

From modern horror hits like Get Out to iconic classics like The Godfather, these R-rated masterpieces define cinema at its daring and dashing best.

Horror? Guaranteed. Survival? Less so.

Read an excerpt of this deep-space mystery from the prolific writer of 'Whalefall' and 'Angel Down.' ...