It may be semantics, but "endorses" isn't exactly the word I'd use. There are a number of books for which he's agreed to do interviews and those are ones that you can count on his having had no objections to being published. If you have a question about a specific book, that might be easier to answer than giving a broad statement about which is which.Are the only books about himself that SK endorses by Douglas E. Winter? Or are there other ones he endorses as well?