If you want a book on the rationalists that's not a smear dictated by a person who is banned from their Wikipedia page for massive npov violations, I hear Chivers' The AI Does Not Hate You and Rationalist's Guide to the Galaxy are good.
(Disclaimer: Chivers kinda likes us, so if you like one book you'll probably dislike the other.)
It might be fair play, however. If I correctly recall, LessWrong had, for a while, a prominent wiki admin who had been punted from Wikipedia for his frothing npov.
I am not aware of Less Wrong having a Wikipedia admin. Are you perhaps thinking about David Gerard, admin of RationalWiki and Wikipedia, who once got in trouble for his decade-long internet crusade against Scott Alexander?
(Disclaimer: Chivers kinda likes us, so if you like one book you'll probably dislike the other.)