A History of Freedom of Thought

History of Rationalism Embracing a Survey of the Present State of Protestant Theology

History of Free Thought in Reference to The Christian Religion

A Short History of Freethought Ancient and Modern, Volume 2 of 2 Third edition, Revised and Expanded, in two volumes

A Short History of Freethought Ancient and Modern, Volume 1 of 2 Third edition, Revised and Expanded, in two volumes