The following are books on the sociology of religion that have been recommended by the professors at Leiden University, The Netherlands. They are classics in their own right, or anthologies of the best and most important text in the field.
The links on this page get me a small referral fee if you buy one of these books at Amazon.
The Sociology of Religion: Theoretical and Comparative Perspectives, second edition, Malcolm Hamilton, First edition 1995; Second edition first published 2001, reprinted edition of 2005 consulted. Buy in the UK and Europe (amazon.co.uk)
A Reader in the Anthropology of Religion (Blackwell Anthologies in Social and Cultural Anthropology), edited by Michael Lambek, 2002, Blackwell Publications Malden USA, Oxford GB, Carlton Au. Buy in the UK and Europe (amazon.co.uk)
The Varieties Of Religious Experience: A Study In Human Nature , Being the Gifford Lectures on Natural Religion Delivered at Edinburgh in 1901-1902, by William James, Longmans Green and Co. London, New York, Toronto, 1945. Buy in the UK and Europe (amazon.co.uk)
John McManners (editor), The Oxford Illustrated History of Christianity (Oxford Illustrated Histories) (1993 edition, reissued 2002). Buy in the UK and Europe (amazon.co.uk)