First of all, thank you Craig for the link to tensegrity. Very interesting stuff that I look forward to exploring.
I have a quaint admiration for Castaneda's work. I've read about 7-8 of his books and my personal favorite was "Tales of Power" for its wonderful imagery and enticing philosophy. I have not read a lot of his post-80's stuff as well, but I did find "The Power of Silence" an amusing read.
If they are read like fiction, then there is definitely some enjoyment, and just maybe a little insight, in the Castaneda books.