Older/historical -- mostly pre-1990 -- many of these are available only as used books, but you may still find them at Amazon.com or at ABEBooks or Powell's Books)
Twenty Years at Hull-House
Jane Addams / Mass Market Paperback / Published 1996
The New Wedding: Creating Your Own Marriage Ceremony
Khoren Arisian / Published 1974
History, Religion, and Spiritual Democracy: Essays in Honor of Joseph L. Blau
Maurice Wohlgelernter (Editor) / Hardcover / Published 1980
Judaism in America : From Curiosity to Third Faith
Joseph Leon Blau, Joseph Blau / Paperback / Published 1978
Emerson on Transcendentalism
Ralph Waldo Emerson, Edward L. Ericson / Paperback / Published 1986
The Biography of the Gods: A Panoramic View of the Gods of the Great Religions, Drawing on History, Theology and Literature
A. Eustace Haydon / 1942 / reissued 1967
Modern Trends in World Religions
A. Eustace Haydon (Editor) / Hardcover / Published 1968
The Quest of the Ages
A. Eustace Haydon / 1929
Personal Destinies : A Philosophy of Ethical Individualism
David L. Norton / Paperback / Published 1976
Nietzsche the Thinker: A Study
William M. Salter / 1917