That gives an overview on different opinions within the broad classical liberal/libertarian perspective on ‘radical capitalism’?
A book that for example summerizes the visions of Hayek, Friedman, Mises, Rand & Rothbard or something like that. Or just the ‘rule-utilitarians’, ‘natural law anarchists’ and ‘objectivists’. Something like it. I’ve read a fair deal; but a friend asks for a book like that and I can’t really think of one.