Ooooh, you should definitely try 'The Diary of Laura Palmer'.
It's so dark and it REALLY makes you think when you read it. You have to read it a couple of times until you REALLY understand it. It's so trippy! It tells of the life of a girl before she is found washed up on a beach dead in a plastic bag. It tells of all the drugs and sex she got into before she died.
And it's based on a true story! And to follow there book (also a true story) is a series called 'Twin Peaks'. You should watch it after reading the book. There's only one season of it. Twin Peaks just tells of a detective who tries to figure out why and how Laura Palmer died, what she was getting herself into (cause everyone thought she was the town princess, when really, she was a dirty drug dealing wh,ore.) and it's so awesome.
Do try it !