With these controversies, the Saint and Doctor converted tens of thousands of protestants to the true religion:

• ISBN-10 ‏ : ‎ 0895553872
• ISBN-13 ‏ : ‎ 978-0895553874

I think this a good reference to give to a protestant of good will, who's searching for the Truth with an open mind.

It covers at least 5 very important controversies: the lack of mission of protestant ministers, the visibility of the Church, purgatory, the authority of St. Peter and the canon of Scripture. They are so thorough, so sound and convincing that when I finished I just wanted more! I would love to read the Saint discuss veneration of saints and holy images, but he never conceived the controversies as a unit. He wrote them separately and just slid them beneath doors and posted them as pamphlets, since he was forbidden to preach.

Praise God for giving his Church this great doctor! St. Francis de Sales, pray for us!