"Catholic Moral Principles Explained: A Brief, Reasonable, and Popular Survey of Catholic Moral Norms" is a work by the famous American theologian John Henry Stapleton, which reveals the basic principles of Catholic ethics and morality. The book examines in detail the concepts of good, evil, conscience, justice and other moral categories that form the basis of Christian values. The author presents complex concepts in a simple and easy-to-understand way, guiding the reader to a deeper understanding and internal evaluation of his own moral standards. "Catholic Moral Principles Explained" is not only an important guide for the faithful, but also a valuable contribution to the contemporary debate on religious and moral issues.