It can seem as though everyone in Silicon Valley is either heading to or coming back from a psychedelic trip, and it is probably Michael Pollan's fault. He did after all write a best seller, "How to Change Your Mind," about how healthful psychedelics can be. His neighbor Ayelet Waldman, whose memoir "A Really Good Day" recounts how taking acid helped her mood and marriage, has something to do with it, too. And now, inspired by Pollan, the writer T.C. Boyle has a new novel, "Outside Looking In," about Timothy Leary, the charismatic Harvard professor turned psychedelics pied piper of the 1960s. [continues 1164 words]