- Naturalism and Agnosticism by James Ward, 2003-07-26
- Kant and Spencer a Study of the Fallacies of Agnosticism by Dr. Paul Carus, 1904
- Gnosticism and Agnosticism and Other Sermons 1887 by George Salmon, 2007-07-25
- Gnosticism and Agnosticism and Other Sermons by George Salmon, 2007-07-25
- Agnosticism by John Gerard, 1928
- Positivism, Agnosticism, Idealism and Mentalism by A. Seth Pringle-Pattison, 2005-12-30
- A physician's pilgrimage: From atheism and agnosticism to fundamental Christianity by Kemp P Neal, 1976
- Theism Or Agnosticism: An Essay On The Grounds Of Belief In God (1886) by Brownlow Maitland, 2007-11-03
- Beyond agnosticism by Bernard Iddings Bell, 1930
- Ingersollia: Gems of thought from the lectures, speeches and conversations of the late Robert G. Ingersoll, together with biographical sketch and record ... sacred rites of great apostle of agnosticism by Robert Green Ingersoll, 1899
- Essays and Criticisms: Why I am an Agnostic? Huxley and Agnosticism. by Robert G. Ingersoll, 1897
- Agnosticism And Other Essays by Edgar Fawcett, 2007-08-29
- Gnosticism and Agnosticism and other Sermons by George Salmon, 1887
- Agnosticism And Religion: Being An Examination Of Spencer's Religion Of The Unknowable Preceded By A History Of Agnosticism by George J. Lucas, 2007-07-25
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