He(Mckenna) isn't for everyone, he is most famous for his raps on psychedelics but he also has many lectures on other topics as well which is what i like about him, particularly alchemy and hermeticism, his books are also great, his book food of the gods is a good place to start if your are interested in exploring his ideas. He used to say that ideas are for play. I don't know how much you've looked into him Bob but he does have a vast amount of work on youtube and in books, but like i said, not for everyone, it does help to be stoned or into physcedelics because that was he expertise but like you say he was thought of as a philospher at the same time. (As you can tell I'm a fan of mckenna)