Protestantism
Free to read here, from Project Gutenberg.
History of Rationalism Embracing a Survey of the Present State of Protestant Theology
Protestantism and Catholicity compared in their effects on the civilization of Europe
The Confutatio Pontificia
St. Paul and Protestantism, with an Essay on Puritanism and the Church of England
Versuch einer Kritik aller Offenbarung
El Protestantismo comparado con el Catolicismo en sus relaciones con la Civilización Europea (Vols 1-2)
