Lolita by Vladimir Nabokov was another book on my classical reading list. Even though this book was written extremely well, I had a difficult time getting past the the main idea of the plot. The book is narrated by Humbert Humbert, and begins when he is a teenager. As a teenager, he has a girlfriend who is the love of his life, but she dies of an illness and crushes his heart. He never recovers from this blow, and almost becomes stuck as a 13 year old kid. Well, this poses major problems for Humbert as an adult as he is attracted to young teenage girls. The book is essentially his obsessive love affair with a young girl that ultimately ends in murder.
If you can get past the aberrant nature of the plot, this book will give you insight into the mind of a madman. The prose is really good and it is amazing how the thoughts of a lunatic start to make sense once you are able to see things from his perspective.