Space Trilogy 1: Shannon Rose

The overarching theme that I found throughout these books was one that emulated the epic battle of man between good and evil. It's interesting because when Dr. Redick assigned the Narnia story assignment, this is the very theme that I chose to highlight. I feel as if there is almost more detail present in the battle between good and evil in The Space Trilogy that it is in The Chronicles of Narnia. It even seems more overtly central at times whereas Narnia's theme of good and evil is a tad more obscure. 
The Space Trilogy, we see a clearly illustrated, science fiction-esque rendition of the fall of man from the Genesis account in the Holy Bible. In Out of the Silent Planet explores Lewis' take on a post-fall world, that is, a world without sin any longer. The people of this world were far more "morally advanced" as Lewis puts it. The people of this world could not even grasp the concept of the symptoms of sin that Ransom's world (as well as our own) was subject to. The second book is titled Perelandra and almost jumps back in time as Lewis apparently attempts to exemplify the garden of eden. There Ransom witnesses and interacts with the first temptation of an "unfallen woman". The last book, A Hideous Strength, Lewis recreates the current struggle in the world by pitting Ransom against an evil organization. I see it as a sort of spiritual warfare illustration.