Latin Grammar and its companion Second Latin are designed to teach a person who to read Catholic Ecclesiastical Latin. Latin Grammar prepares a person to read both the Missale Romanum and the Breviarium Romanum with exercises from both. Second Latin continues the course into deeper theology and philosophy vocabular and exercises. At the end of both books a person ought to be able to read everything from the Summa of Saint Thomas Aquinas to the Codex Juris Canonici.