The following books are suggestions for further reading on the history of humanism and secularism in the UK. It does not include the many books written about individual humanists and secularists.
You can buy these books from Amazon. If you use this link the British Humanist Association will receive a small portion of the price.
Also Bishopsgate Library offers free public access to its collections on freethought.
2000 Years of Disbelief: Famous People with the Courage to Doubt by James A. Haught (Prometheus Books 1996)
A History of Atheism in Britain: From Hobbes to Russell by David Berman (Routledge 1990) Read online
Against the Faith: Some Deists, Sceptics and Atheists by Jim Herrick (Glover and Blair 1985)
British Moralists on Human Nature and the Birth of Secular Ethics by Michael Gill (Cambridge University Press 2006) Read online
Humanism: An Introduction by Jim Herrick (Rationalist Press Association 2003) Buy direct from the British Humanist Association
Humanist Anthology by Margaret Knight, revised by Jim Herrick (Rationalist Press Association 1995) Buy direct from the British Humanist Association
Radicals, Secularists and Republicans: Popular Freethought in Britain, 1866-1915 by Edward Royle (Manchester University Press 1980) Read online
Victorian infidels : the origins of the British secularist movement 1791-1866 by Edward Royle (Manchester University Press 1974) Read online
Western Atheism: A Short History by James Thrower (Prometheus Books 1999)
Women Without Superstition: No Gods – No Masters – edited by Annie L. Gaylor (Freedom from Religion Foundation 1997)