Book reviews and critical studies

Azizah al-Hibri, 1979, ‘Understanding Ross's Paradox’,Southwestern Journal of Philosophy 10, 163–170. —, 1980, ‘Conditionality and Ross's Deontic Distinction,’Southwestern Journal of Philosophy 11, 79–87. Lennart Aqvist, 1967, ‘Good Samaritans, Contrary to Duty Imperatives, and Epistemic Obligations,’Nous 1, 361–379. Holly S. Goldman, 1977, ‘David Lewis's Semantics for Deontic Logic,’Mind 86, 242–248. Bengt Hansson, 1969, ‘An Analysis of Some Deontic Logics,’Nous 3, 373–398. Jaakko Hintikka, 1971, ‘Some Main Problems of Deontic Logic,’ in Risto Hilpinen (ed.)Deontic Logic: Introductory and Systematic Readings, New York: Humanities Press, 59–104. David K. Lewis, 1973,Counterfactuals, Cambridge: Harvard University Press. H.J. McCloskey, 1969,Meta-Ethics and Normative Ethics. The Hague: Matinus Nijhoff. John Searle, 1978, ‘Prime Facie Obligations,’ in Joseph Raz (ed.),Practical Reasoning, Oxford: Oxford University Press, 81–90. Wolfgang Spohn, 1975, ‘An Analysis of Hansson's Dyadic Deontic Logic,’Journal of Philosophical Logic 4, 237–252. Bas C. van Fraassen, 1972, ‘The Logic of Conditional Obligation,’Journal of Philosophical Logic 1, 417–438. —, 1973, ‘Values and the Heart's Command,’Journal of Philosophy 70, 5–19. G.H. von Wright, 1951, ‘Deontic Logic,’Mind 60, 1–15. —, 1964, ‘A New System of Deontic Logic,’Danish Yearbook of Philosophy 1, 173–182.