Animal Farm is great! Reading it was probably the first time I understood anything about politics
A person who likes Animal Farm and 1984 might also enjoy Bulkagov's Master and Margarita. It was written in the Soviet Union before the second world war, and it contains heavy political satire. It's not similar at all to Orwell's books, but should one be able to acquire a version where the parts that the Soviet officials cencored from the original text are highlighted, it would be a really surprising and a teaching read. Don't know if such versions are printed anymore, I used to have one in Finnish. But even if there's only a normal version available, read it! It's a great book!
I recently finished Dan Simmon's Hyperion, and now I'm reading the sequel, the Fall of Hyperion.