I enjoyed listening to a Future Primitive interview with Dennis McKenna. I often listen to these Joanna Harcourt-Smith discussions.
This is the brother of Terence McKenna and hes about to write a book about the relationship of these brothers and their journey into the psyche.
Interesting and more so as he is using KickStarter to fund his writing. http://www.kickstarter.com/projects/1862402066/the-brotherhood-of-the-screaming-abyss
Here is the interview:
Oh, and I pledged to buy the book!