Alan Rogerson - Millions Now Living Will Never Die: A Study of Jehovah's Witnesses (1969), London, Constable, 1969. xiv,216 pages.
This well-written book analyses Jehovah's Witnesses from a historical and sociological perspective. Written in 1969 it has been out of print for over 30 years which is unfortunate as it is in many respects one of the best book ever written about the JWs. Written by a former member who is not an apostate, it has insights rarely found in book written by the Watchtower outsiders.
Still out of print, used copies of this book often sell for well over $100.