Stephen L. Brock’s The Light That Binds is an excellent treatment of St. Thomas Aquinas’s natural law teaching in the Summa theologiae. The exposition and argument present a cogent and insightful tour of the theological and metaphysical architecture of the legal transept, as it were, of the cathedral that is Aquinas’s Summa, all while engaging the views of a variety of contemporary scholars. In what follows, I consider the book overall, note some high points of its chapters, and offer some thoughts for future readers of the book.