"It frightens me.  But Mike knows what Jubal likes.  Look at the book itself.  It falls open naturally to any one of three places.  Now look at the pages - this page has been handled more than the other two.  Mike has picked the Boss's favorite.  This other one - 'The Caryatid Who has Fallen under the Weight of Her Stone' - he likes almost as well.  But Mike's choice is Jubal's pet."