100 years of freethought.

Tribe, David H.
London : Elek, [1967]

History of the rise and influence of the spirit of rationalism in Europe.

Lecky, William Edward Hartpole, 1838-1903.
New York : G. Braziller, 1955.

The idea of Enlightenment : a post-mortem study

Bartlett, Robert C., 1964-
Toronto ; Buffalo : University of Toronto Press, [2001]

Liberation philosophy : from the Buddha to Omar Khayyam : human evolution from myth-making to ration

Vaziri, Mostafa, 1956- author.
Wilmington, DE : Vernon Press, 2019.

Protestant thought before Kant.

McGiffert, Arthur Cushman, 1861-1933.
New York : Harper, [1962]

Reason and being

Kuznet͡sov, B. G. (Boris Grigorʹevich), 1903-1984.
Dordrecht ; Boston : D. Reidel Pub. Co. ; Norwell, MA, U.S.A. : Sold and distributed in the U.S.A. and Canada by Kluwer Academic Publishers, [1986]

Varieties of unbelief : atheists and agnostics in English society, 1850-1960

Budd, Susan, 1941-
London : Heinemann Educational Books, 1977.