I loved the movie too. I was really pleased I read the book first because although the movie is a really good rendition, I feel it would be hard to comprehend certain parts of the movie without knowing the book.

The acknowledgements page after the ending of the book is brutally heart breaking: he mentions all the friends he lost to psychosis and death, due to the drugs they all took together.

I also find that the book remains a fantastic read a second or third time - which I only find worthwhile doing with a few books.