This is an excellent self help book - for me, at any rate. it gives you 'permission' to NOT be assertive about everything. As someone who has been told to be more assertive, i found it demonstrates how being assertive about everything results in bad feeling for yourself and others, increased stress and lack of humour and calmness in life. There are many people in life who would do well to read it - sometimes less is more!
I agree that we shouldn't be complacent or have people walk all over us - but so often people have too great a sense of their own importance and seem to get upset by the fact that people don't always get as worked up about things as they do.
Was also very sad to hear that the author died tragically young.