See thus legally free ebook:
Faith & Politics: Vatican II and [the] Basics of Catholic Citizenships, by Fr. Bernhard Blankenhorn, O.P. (June 7, 2012). 17 pages. Available in PDF format at the website of the Blessed Sacrament Parish, Seattle, USA.
On the Memorial of St. Louis IX, King of France, in the Roman Rite. For other legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).