Books like Grounding for the Metaphysics of Morals/Metaphysical Principles of Virtue

Grundlegung zur Metaphysik der Sitten (Riga: Johann Friedrich Hartknoch, 1785), xiv, 128 pp.; 2nd edition: 1786. [Ak. 4:387-463] “Groundwork of the Metaphysics of Morals.” Translated by Lewis White Beck, Immanuel Kant: Critique of Practical Reason and Other Writings in Moral Philosophy (Chicago: University of Chicago Press, 1949). Translated by James Ellington (Indianapolis: Hackett, 1981). Translated by Mary J. Gregor in Immanuel Kant, Practical Philosophy, edited by Mary J. Gregor (Cambridge: Cambridge University Press, 1996), pp. 43-108.