I enjoyed Don Quixote. I read a translation, of course, since I don’t read Spanish. But it was a fun book.
I regard Huck Finn as the greatest literary work that I have ever read. It made a huge impact on me.
I read Screwtape Letters (C.S. Lewis) every year or so.
Only one book has changed my life (The Bible).
I also read a translation of it and it made me laugh but it got monotonous sometimes.