VICTOR said, "Back then the only published books were Confessions of a Watchtower Slave, Ray Franz' books, and Visions of Glory."
As someone who was around "back then," I want to clarify the chronology of those 3 pioneering books:
"Thirty Years a Watchtower Slave : The Confessions of a Converted Jehovah's Witness" by William Jacob Schnell, appeared in 1953 and was not widely known, as far as I know - it was "before my time." I have not read it because: a) I don't need it b) I have heard that it wasn't that good; revealed no secret history, etc., mostly a list of personal complaints.
"Visions of Glory: A History and a Memory of Jehovah's Witnesses" by Barbara Grizutti Harrison appeared in 1978. THIS was "my book." I had the great joy of speaking with BGH before her death. This book really helped crack my cosmic egg.
"Crisis of Conscience : The Struggle between Loyalty to God and Loyalty to One's Religion" by Raymond Franz, (c.1983) I understand that to many people this is "THE" book. I left BEFORE Ray Franz did. If he met me in 1980, he would have DISFELLOWSHIPPED me, so I don't feel I owe him anything. I have read portions of his book. His second book, "In Search of Christian Freedom" materialized in 1992.
I post this to make it clear that these books were NOT contemporaneous. They served vastly different audiences.
I could not find any book with the exact title "Confessions of a Watchtower Slave".