One of the greatest spiritual classics ever written, this influential book has been translated into nearly every world language and has led scores of people back to their faith in religion. Peasants, popes, men, women, and children have fallen under the spell of this unconventional masterwork, beautiful in its deep and divine insight. Reprint of the Newman Press edition, Maryland, 1956.
Here's a sample of other books in this Dover category
Orthodoxy by G. K. Chesterton Chesterton explains the values and ideals that constitute the foundation of Christianity, adopting an informal style in his scholarly arguments in favor of faith as an affirmation of human freedom.
Dark Night of the Soul by St. John of the Cross In this spiritual masterpiece — a classic of Christian literature and mysticism — the author addresses pride, avarice, envy, and other human imperfections, describing methods of conversion through prayer, submission, and purification.
Introduction to the Devout Life by St. Francis de Sales, Allan Ross, Allan Ross How to live a holy life in the secular world is the focus of this Christian masterpiece. It offers clear, direct advice about praying, resisting temptation, and maintaining devotion to God.