I am not much of a science fiction aficionado but I gave these books by C. S. Lewis a try because I love the Chronicles of Narnia so much.
I didn't really like these books. I never really got into them. the plot of all three of them while connected in some ways really had nothing to do with each other and really didn't seem all that connected within the books themselves.
I did enjoy the books but the plot took such a turn that often I really didn't understand the story. I guess I'm still not much for science fiction and found myself very disappointed especially when comparing those books to Chronicles of Narnia which I absolutely love.