Few stories in the annals of American counterculture are as intriguing or dramatic as that of the Brotherhood of Eternal Love.

Dubbed the "Hippie Mafia," the Brotherhood began in the mid-1960s as a small band of peace-loving, adventure-seeking surfers in Southern California. After discovering LSD, they took to Timothy Leary's mantra of "Turn on, tune in, and drop out" and resolved to make that vision a reality by becoming the biggest group of acid dealers and hashish smugglers in the nation, and literally providing the fuel for the psychedelic revolution in the...