* After Virtue: A Study in Moral Theory (1981): A highly influential work that argues that modern moral philosophy has lost its grounding in virtue ethics and has become incoherent.
* Whose Justice? Which Rationality? (1988): An exploration of the relationship between justice and rationality, arguing for a communitarian approach to justice.
* Three Rival Versions of Moral Enquiry: Encyclopaedia, Genealogy, and Tradition (1990): An examination of three different approaches to moral inquiry: the encyclopedic, the genealogical, and the traditional.
* Dependent Rational Animals: Why Human Beings Need the Virtues (1999): A defense of virtue ethics and its importance for human flourishing.
* Ethics in the Conflicts of Modernity (2000): A collection of essays that explore the ethical challenges facing modern society.
John J. MacIntyre is not a prominent author, and there is no readily available information about his written works. It's possible there is a less-known author with that name, but without more context, it's difficult to say for sure.