Acid Dreams encompasses a number of rich histories. In exploring them, you may wish to seek out more information on the principal characters. Here are a few recommended starting points:
Grateful Dead homepage
Learn more about Captain Al Hubbard
Key-Z productions, the web home of Ken Kesey's production company.
Tim Leary's homepage
Literary Kicks, a great site dedicated to all things Beat.
MAPS (Multidisciplinary Association for Psychedelic Studies)
NORML, the National Organization for the Reform of Marijuana laws.