I recall reading the first three of Carlos Castaneda's books back in the day. I found them fascinating but never really took them seriously even after having some pretty intense experiences with entheogens during my late teens and twenties. Once my uncle was visiting and we were talking about the Castaneda books. He was quite taken with them. He told me a story about something that happened when he was a young boy. In the Mexican part of town where he lived there was an old woman who had the reputation of being a curandera. He said she once related a conversation he'd had with a friend of his. He expressed surprise at her knowledge since there had been no one else around. According to my uncle she asked him if he remembered the black bird sitting on the fence near where they had been talking. When he replied that he did she told him, "That was me."
It's with that same fascination that I read and listen to Terence McKenna even though I do not subscribe to his world view. I believe in the reality of an external world, one I hold in common with others in my space-time frame. But like Castaneda McKenna makes for some interesting reading.