I guess you'll never know since you don't plan on reading the book.
I'm well-acquainted with the theory. But there are a lot of wacky AIDS conspiracy stuff going back to the Eighties. No one has any undeniable proof. You'll find there are web sites that have promoted the same ideas for a number of years. They don't have any proof either.
Even if it were true, what difference does it make to people who are sick now and who have yet to catch it?