Could you give a run down of the book?
it looks how different psychedelics and hallucinogens can create the immense mindscapes and fractals thru fairly simple changes to our senses/ inputs along side feedback or frame stackking.
we expericance life on average about 16 frames a second to get the smooth feel. stuff like the wah wah wah wah you get from nitrous oxide happens on a different frequency and can interfere and mess up the 16fps of our consciousness, when you get to dmt and salvia the effects can make each frame we're perceiving overlap with preceding and following frames causinf them to stack and like in my avatar start appearing to go on forever.
once you get more than 16 frames stacked thats when it breaks down and you lose all awareness of yourself and your surroundings alsmost becoming a singularity
theres alot more to it all than just that but its is worth a read i think its a bit heavy going in parts but most of its understandable