I was born about the time this was being written, and first discovered it by accident when I was 15. I love it, and ensure I re-read it every 18 months or so. Each time I read it, it takes me ages, as it is one of those books that is so thought-provoking that you have to stop every few pages and relate it to your own life (and re-assess!). It forces you to look at the good, the bad, and the scary in yourself, but inspires you to do something about things too.
I think everyone, male and female, should read this book. It may have been written in the late 70's, but (unfortunately in places) it still has relevance today, and everybody will find a character or aspect of a character they will identify with.
I recommend this book so highly, I have bought copies as gifts for my mother and other friends when they were going through difficult times.