Looking for a book about john lennon 'conspiracy'?

I'm not a 'conspiracy nut',so no opinons on my choice of reading thank-you! I just find these things interesting and like to keep an open mind whether its jfk or diana or reptilians/ illuminati/ the elite or 911 or the whole 2012 thing. call me a loon if you want but i'd rather read about this kind of stuff rather than glib celebrity crap like hello and ok!