High Weirdness is fun enough to draw you in & wonky enough to make you keep your distance.
Imho, Davis seems so enamoured with the “weird” of west coast psychedelic counterculture, the weird of the GD et al, that it can over-ride his focus because that’s his self-confessed tribe.
If you can filter it, overall the ontological analysis of Latour is fun. I skimmed the McKenna(s) section due to the absurdity behind their “experiment”. The PKD section is the strongest. Hints at dissociation, eg : the metal face in the sky (abuse history?), but it has a glaring hole in the shape of the influence of folks like William Burroughs, his fixation with Control, the Yage explorations & the scope of possibilities with use. It’s touched upon, but maybe for reasons to do with keeping it all Left Coast, you keep bumping into that hole.
Frustrating, but there are gems in there aplenty.