Animal farm
1984
Brave New World
The Earth Abides
The long Walk by the polish author
There's a few others to add: Once an Eagle, Texas (by Michener), and the Kent Family Chronicles (actually any of John Jakes' novels). Trouble for most readers is the length of these books. I read them all when I was stationed in Germany, went without TV for 4+ years. My apartment was too far from base to access the American Forces Network, so my time at home was spent reading, and mixing cassette tapes.