Christine M. Korsgaard is Arthur Kingsley Porter Professor of Philosophy at Harvard University. She is the author of Self-Constitution: Agency, Identity, and Integrity (2010), The Constitution of Agency (2009), The Sources of Normativity (Cambridge University Press, 1996) and Creating the Kingdom of Ends (Cambridge University Press, 1996). Jens Timmermann is Reader in Moral Philosophy at the University of St Andrews. He is the author of Kant's Groundwork of the Metaphysics of Morals: A Commentary (Cambridge University Press, 2007) and Sittengesetz und Freiheit (2003). He is the editor of Kant's Critique of Practical Reason: A Critical Guide (with Andrews Reath, Cambridge University Press, 2010) and of Kant's Groundwork of the Metaphysics of Morals: A Critical Guide (Cambridge University Press, 2009).
...Groundwork of the Metaphysics of Morals is an original, profound, and beautifully written piece. --George Lazaroiu, PhD, Institute of Interdisciplinary Studies in Humanities and Social Sciences, New York, Contemporary Readings in Law and Social Justice