premise: Actually, I am, because I recall them -- an organization actually sending the library those books, because there was controversy in those books being put in there, too. And there were many members of the community who had called to see whether those books had actually gotten there or not, into the library, because we weren't certain that those books were going to be allowed in the library, permitted in the library.
hypothesis: All books are controversial.
reason: Reason:  There are non controversial books.  Why:  In this context, all mentioned books are controversial.