A Short Reading List on Ethical Culture (These and many other books are available from the American Ethical Union. .)
By Felix Adler
Good introduction via short excerpts
Our Part in This World
Life and Destiny
Longer monographs
An Ethical Philosophy of Life (1918)
The Reconstruction of the Spiritual Ideal (1923)
Collections of addresses
The Religion of Duty
Creed and Deed
About Felix Adler
Felix Adler and Ethical Culture (1981) by Horace Friess
Felix Adler (1974) by Robert S. Gutchen
From Reform Judaism to Ethical Culture (1979) by Benny Kraut
(the last two out of print)
History of Ethical Culture (from origins to about 1968)
Toward Common Ground (1969) by Howard Radest
Ethical Culture as a Religion and as Humanism
Ethics as a Religion by David S. Muzzey
The Humanist Way: An Introduction to Ethical Humanist Religion (1988) by Edward L. Ericson