Thomas Szasz, The Myth of Mental Illness :

This is a classic attack on the notion that there is any such thing as 'mental illness. Szasz is himself a psychiatrist, happens to believe in 'people having problems' of an emotional, spiritual, psychological nature, but not in the phony medical 'disease of the mind' explanation embraced by orthodox psychiatry. Szasz, a right-wing libertarian, seems more concerned with the role of 'mental illness' in excusing people for their actions in the courtroom, but whether you are talking about blame-the-victim or excuse-the-culprit, his logic is inescapable.