Out of the Silent Planet, by C. S. Lewis
Cleo invited people to join her in a 3-month reading project of C. S. Lewis' Space Trilogy, and I happily signed up. September was Out of the Silent Planet.
A linguistics professor, Ransom, is on a walking holiday when he runs into an old schoolmate, now working for an eminent scientist. They promptly kidnap Ransom, put him in a homemade spaceship, and take him to the planet Malacandra, where they plan to give him over to the inhabitants as a sort of tribute. Ransom escapes to the wilds of Malacandra, but how to survive in an alien environment? He doesn't even know which planet he's on....
If you haven't read the Space Trilogy, I don't want to spoil it. It's a strange set of books and Lewis plays around a lot with mixing science fiction (or, as he called it, scientifiction, which I don't even know how to pronounce) with his beloved subject matter of the medieval view of the universe. I rather suspect that no one else has done that before or since!
I am too much of a Lewis fan to really be able to critique this properly. I enjoyed it a lot and am looking forward to October's title, Perelandra.