Yes it’s a very interesting book. I have a copy, somewhere.
There are many incidental comments that illuminate the period. It shed a little light on the length of Rutherford’s illness I posted about in this thread.
https://www.jehovahs-witness.com/topic/154191/rutherford-exposed-story-berta-bonnie-redux?page=11
I guess you know about Werner Cohn’s article about JWs as a “proletarian” movement.
Cohn, W. (1955). Jehovah's Witnesses as a proletarian movement. The American Scholar, 281-298.
He also wrote about JWs and “racial prejudice”. I’m not sure how accurate his comments were.
https://www.jehovahs-witness.com/topic/5687757573718016/jehovahs-witnesses-racial-prejudice-werner-cohn
Very good to have someone interested in WT history on the site.