I brought the physical copy along on my vacation, and it was a AWESOME.
The tome is an invaluable resource into the dealings of cults of Cthulhu and the details in the tome and various cult excamples are fantastic, well written and a treasure throve of ideas.
The use of "Scientology" as one of the cults was a stroke of genius.
Now all I want for Halloween is an like tome, but with the focus of Hastur/The King in Yellow (And perhaps one for Shub Niggurath)
Great work team Chaosium 😄