This is a great book. RAW does differ with Leary on the 6th and 7th circuits.
If you enjoy this book check out Antero Alli's book "Angel Tech" He takes all of it a big step further. He even teaches a class on the subject (following Leary's version not Wilson's) at RAW's Maybe Logic Academy. I took the first version of the class and it was good. More exercises, discourse with Alli, etc.
Really I'm not trying to plug it...just had good experiences.
Also check out this link:
http://web.archive.org/web/20010301174817/www.netside.net/~szot/Leary11.html
Talks about the Hindu Tantric origins to Leary's model
The most interesting drug aspect to these books is the idea of being able to re-imprint using psychedelic drugs. This seems like a great possibility especially with someone who knows what they are doing...
Here is an article Alli wrote about drugs and the eight circuit brain model:
http://www.paratheatrical.com/pages/...OXICATION.html