There is an interesting Facebook page called Bobby Fischer's True History that is a treasure trove of Fischer material. The "About" section says the purpose of the page is, "dispelling the HYPE and FICTION spread by the Media about Bobby Fischer's religion and politics." The author states, "The true story of what happened to my church brother, Bobby Fischer, who attended the Herbert W. Armstrong cult from 1962 into the 1970’s. The cult utilized terror and destructive mind control methods to maintain a hold over Bobby and other members of the Worldwide Church of God. I intend to educate people about the WCG, Armstrong and the personal aftermath of cult victims lives."
The page also contains a link to newspaper archives about Fischer that is quite interesting and the author has obviously spent a good deal of time putting all this together. You will also find posts about President Trump, Kasparov and others. Interesting stuff...some of which may be controversial depending on your views.