Animal Farm by George Orwell - Dystopian fiction at its most creative.
Equus by Peter Shaffer - A dark, discomforting look into the mental decline of a young boy
in the midst of horses.
The Gods Will Have Blood by Anatole France - A twisted and disturbing but truly fascinating look into the lives of French revolutionaries.
I highly recommend all 4 of the above, but be aware -
the last 2 are definitely NOT for the feint of heart...