So... It is biased but still has most of the facts right at least about pre-vatican ii times?
Yes, that’s what he’s saying, that it’s well researched with much factual information … for those who are capable of sifting out the author’s bias. In the intro on Amazon (not sure who wrote it), you can see a strong bias against sedevacantism. Also talks about +Thuc working with the CIA to bolster a corrupt government … which is your perspective if you’re not anti-Communist.