List of books from the website of the League of Spiritual Discovery. From the website:

"The original League for Spiritual Discovery was founded in 1966 in the midst of Governments’ and the public’s hysterical reaction to the explosion of psychedelic (aka entheogens) use. Admittedly, much of this use was outside the context of spiritual or religious practice. Nevertheless, legitimate religious use was prohibited as laws were hurriedly passed in disregard for numerous studies that had shown the therapeutic and spiritual benefits of psychedelics. The prohibition laws were so expansive that they effectively shut down all research into the potential benefits of entheogens. The original League for Spiritual Discovery dispersed around 1968 after persecution and arrest of numerous members."

http://www.leagueforspiritualdiscover...