Because he opened the book to the title page, and it looked like this:
I was a mere six inches away from a First Folio of Shakespeare. So close that I could see the little details, like the fact that the "W" in William was actually printed using two "V"s (as in VVilliam Shakespeare). I could smell the book.*
I think my complete and utter awe means I'm in the right sorts of classes.
*A certain well-read friend has taught me that the smell of a book can be a very important visceral part of reading. Try it. You'll notice that your books smell differently.