Thoughts on Religion

A Candid Examination of Theism

The Scientific Evidences of Organic Evolution

Mind and Motion and Monism

Darwin, and After Darwin, Volumes 1 and 3 An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions

Darwin, and After Darwin, Volume 2 of 3 Post-Darwinian Questions

Darwin, and After Darwin, Volume 3 of 3 Post-Darwinian Questions

Animal Intelligence The International Scientific Series, Vol. XLIV.

Jelly-Fish, Star-Fish, and Sea-Urchins

The Life and Letters of George John Romanes, M.A., LL.D., F.R.S.

An Examination of Weismannism

Mental Evolution in Man

Gedanken über Religion Die religiöse Entwicklung eines Naturforschers vom Atheismus zum Christentum.