Listed below are a selection of places to go online for further information on some of the figures, groups, movements, and themes explored on this site. Many of them have been invaluable in the research conducted as part of the Humanist Heritage project, and all of those listed below are available online (in some cases a free Internet Archive account is required).
This list is by no means exhaustive, and always growing.
Funerals without God: a practical guide to non-religious funerals, Jane Wynne Willson (Prometheus, 1990)
Humanist Anthology, ed. Margaret Knight & revised by Jim Herrick (Rationalist Press Association, 1995)
Social Rights and Duties: Addresses to Ethical Societies, Volume I and Volume II, Leslie Stephen (Swan Sonnenschein & Co., 1896)
Practical Ethics; a Collection of Addresses and Essays, Henry Sidgwick (Swan Sonnenschein & Co., 1898)
A Generation of Religious Progress (Issued in Commemoration of the Twenty-First Anniversary of the Union of Ethical Societies), ed. Gustav Spiller (Watts & Co., 1916)
The Ethical Movement in Great Britain: a Documentary History, Gustav Spiller (The Farleigh Press, 1934)
A Biographical Dictionary of Freethinkers of all Ages and Nations, J.M. Wheeler (Progressive Publishing Company, 1889)
Victorian Infidels: the Origins of the British Secularist Movement, 1791-1866, Edward Royle (Manchester University Press, 1974)
Varieties of Unbelief: Atheists and Agnostics in English Society, 1850-1960, Susan Budd (Heinemann, 1977)
Radicals, Secularists, and Republicans: Popular Freethought in Britain, 1866-1915, Edward Royle (Manchester University Press, 1980)
Eve and the New Jerusalem: Socialism and Feminism in the Nineteenth Century, Barbara Taylor (Pantheon Books, 1983)
Women Without Superstition: “No Gods – No Masters”, The Collected Writings of Women Freethinkers of the Nineteenth and Twentieth Centuries, Annie Laurie Gaylor (Freedom from Religion Foundation, 1997)
Radical Spaces: Venues of popular politics in London, 1790–c. 1845, Christina Parolin (ANU Press, 2000)
Main image: British Humanist Association bookstall, unknown date. Bishopsgate Institute Archive (BHA/1/15)