Originally entitled A Brief Christian Doctrine, St. Robert Bellarmine, then a Cardinal, wrote this concise theological work to push back against the spreading errors of the reformation. Written in dialogue format between, a teacher and his student, one can learn to properly memorize and, in brief, explain the different facets of the very core doctrines of the Christian Faith. Whether the listener is a child, young adult, or a middle aged catechumen, this short work by a Doctor of the Church who earned the title 'Hammer of Heretics' can undoubtedly benefit many in our age. St. Robert Bellarmine, pray for us.