True Devotion to the Blessed Virgin by St. Louis De Montfort - $4.95. One of the best books on Marian devotion ever written, and one which, if its teachings were widely implemented, would transform the Church. Has profoundly influenced the lives of great Catholics such as Marthe Robin, the co-foundress of the Foyers of Charity, Frank Duff, the founder of the Legion of Mary, and, of course, Pope John Paul II.
True Devotion to the Blessed Virgin - £6.95 - UK & Europe
The Secret of Mary by St. Louis De Montfort - $5.49. This is a shorter work than the "True Devotion" and approaches the subject with a different emphasis - but for all that, it is well worth reading and meditating on. It is an excellent supplement to the "True Devotion" with its particular emphasis on the way we need to allow ourselves to be "moulded" by Mary if we are to truly to become closer to her, and thus more perfect images of her Son.
The Secret of Mary - £2.50 - UK & Europe
The Love of Eternal Wisdom by St. Louis De Montfort -$4.49. This books puts St. Louis's ideas on Marian Devotion in the context of Jesus as the Eternal Wisdom - thus it is a useful work to read in order to understand his thinking more clearly. Has a very good final chapter on genuine devotion to Mary, which is seen as the most certain way to obtain Divine Wisdom.
The Love of Eternal Wisdom - £3.95 - UK & Europe
The Secret of the Rosary by St. Louis De Montfort - $5.00. This is a beautiful little book which explains in fifty short chapters why praying the rosary is so important. Full of historical examples it is very spiritually edifying, and a great encouragement to persevering in the saying of the rosary, despite the opposition of the world, the flesh and the devil.
The Secret of the Rosary - £2.50 - UK & Europe
God Alone: The Collected Writings of St. Louis de Montfort - $24.95. As the title indicates this is a compilation of the writings of St. Louis, and as such is a good reference work. His works can only grow in importance with time, especially as his prophetic view of a future "Age of Mary" seems to tie in so closely with the message of Fatima which sees the triumph of Mary's Immaculate Heart.
God Alone: the Collected Writings of St. Louis de Montfort - £16.99 - UK & Europe