Thanks for the quote. I have read a fair bit of Lewis, but I have never read his space trilogy. I know now that I must.
I am so glad I could tell you about the books. I know once you start, you won't want to put them down. There are a few slow parts in the first two. The last one is an all-nighter.
I read them when I was going through college with feminist teachers who were hardened and bitter. (For example, I loved English literature, but the literature the feminist teachers chose was not very good -- I ended up running away to the more conservative History field). The whole culture on campus was so utterly dismal. (I knew several "Fairy Hardcastle" types).
I thought I recognized their unhappiness and dogmatism as rebellion against God. Lewis helped me sort out some of my feelings through these books, so that I was not in total despair. Unbeknown to me my future husband was reading them, too. :-)