Ectoplasmosis has a fun discussion today of the influence of H.P. Lovecraft’s fiction upon the real beliefs of occultists. It’s inspired by Erik Davis’ Calling Cthulhu but is fun reading in its own right; not least because it name-checks our own Dan Harms.
Since most Call of Cthulhu games are all about occultists digging in to esoterica that everyone else thinks is false, looking at how those in the real world treat CoC’s subjects can be fascinating. Follow the links and enjoy.