To a generation in full revolt against any form of authority, "Tune in, turn on, drop out" became a mantra and its popularizer, Dr. Timothy Leary, a guru. A charismatic and brilliant psychologist, Leary became first intrigued and then obsessed by the effects of psychedelic drugs in the 1960s while teaching at Harvard, where he not only encouraged but instituted their experimental use among students and faculty. What began as research into human consciousness turned into a mission to alter consciousness itself. Leary transformed himself from serious social scientist into counterculture shaman, embodying the idealism and the hedonism of an age of revolutionary change.

Timothy Leary is the first major biography of one of the most controversial figures in postwar America.

"A veritable who's who of the age of Aquarius and a real page-turner….illuminates the paradoxes of the psychedelic age."

Robert Greenfield is the author of a biography of Jerry Garcia and a book about rock impresario Bill Graham, which won a Ralph J. Gleason Award and the ASCAP Deems Taylor Award for Excellence. He lives in California.