Castaneda faced the problem of many sequel writers: He could not keep up the freshness and impact of his first books, as this relatively late volume shows.
Castaneda the anthropologist has for long been debunked as a fraud. Still, his first books are well written, and have had a profound impact. Once accepted as fiction, it does not matter whether any real encounters with indians were the model for Castaneda's hero Don Juan, the Native American shaman who allegedly accepted the author as a disciple and instructs him, talking like Wittgenstein, Nietzsche and Gurdieff.
Castaneda's first books raise interesting questions on the nature of reality when telling the entertaining story of the narrator being drawn into increasingly unbelievable adventures with the supernatural.
In contrast, this book is rather blandly narrated, and surprises with a surprisingly daft resolution. As we learn, the ultimate reason why the club of Don Juan's students indulge in years of self-denying ascetism to obtain supernatural powers is as follows: After death, the soul flies into the afterlife only to be eaten by a giant eagle spirit; however sorcerers can fly past this creature.
I envy whoever finds that a satisfying answer to the question of the meaning of life.