I used to read quite a lot of RAW, the one I passed around that got the best response was "Reality is What you Can Get Away With"
But yeah, I remember enjoying it, one of his better ones.
If you're trying to get some value out of the whole RAW thing, then read Illuminatus! and then Holy Blood, Holy Grail (Baigent and Lee) and Foucault's Pendulum (Eco). If you tuck them under your belt you culturally you're all set.
Ultimately, if you're looking for self improvement, I can't remember a damn thing from this book, except maybe that he recommends Undoing Yourself With Energised Meditation within it, that's a pretty good book too.
Some of it's coming back to me, I think he recommends in Prometheus Rising the exercise of wondering what it would be like to physically assault / overpower someone you're talking to? I used that in job interviews for about twenty years, and I've spent the last fifteen or so in the 1 percent.
Yeah, read him. RAW was one of the good guys.