A book I recommend to ppl genuinely interested in this movie and not conspiracy theories
Is 'Eyes Wide Shut: Stanley Kubrick and the Making of His Final Film'
By film historians Nathan Abrams and Robert Kolker.
I just finished it a few days ago and it really gave some deep insight into what Kubrick invisioned in his decades long quest to adapt Arthur Schnitzler's short story into a movie, and probe the themes of marriage, jealousy and dreams.