William James 
The Varieties of Religious Experience [PDF ebook] 
A Study In Human Nature

This is the celebratory centenary edition of this classic work, available in paperback for the first time in the Routledge Classics series

A classic scientific exploration of religious belief and a major work of twentieth century psychology

An essential purchase for readers of such recent titles as Richard Dawkins » The God Delusion

Supported by the simultaneous release of two other titles from C.G. Jung on religion and mysticism: Psychology and the Occult and Psychology and the East