I was looking for the subject of his next book that he didn't finish.
I just read that it was pancreatic cancer.
This might be worth checking over for info: https://www.reddit.com/r/conspiracy/comments/5edfbi/today_is_the_1_year_anniversary_of_david_mcgowans/
I think including criticisms helps round out a profile. This criticism says he was 100% controlled opposition (which I don't believe): http://questioningourreality.blogspot.ca/2016/02/did-dave-mcgowan-die-or-did-he-fake-his.html
Link to his work: http://www.whale.to/b/pedophocracy.html