I do not think this publication exists. The author is trying to say that 'what happens next' is something that defies rational explanation.
granola is used as a reference to people who eat 'natural' food
'new age' and 'spirit world' are references to a movement whose members tend to believe in non-scientific explanations for the phenomena one encounters in daily life.
The writer is saying that 'what happens next' is hard to explain using logic and that, if s/he hadn't witnessed it firsthand s/he wouldn't have believed it.
I hope this is useful,