Samizdat

 “They were the black, forbidden things which most sane people have never even heard of, or have heard of only in furtive, timorous whispers; the banned and dreaded repositories of equivocal secrets and immemorial formulae which have trickled down the stream of time from the days of man’s youth, and the dim, fabulous days before man was.”

–HP Lovecraft, “The Haunter of the Dark.” (Books in the Starry Wisdom Library.) 

http://crypt-of-cthulhu.com/lovecrafttheosophy.htm