The docent also told us that the old films are kept in separate vaults, each with it's own fire suppressant system in place. That way, they only lose one/two in the event of fire.
There are two bibles on display on the second floor. Both are under glass and no photography is permitted of them. There are multiple exhibit halls, each with a different set of books on display. As late as we were getting there and the fact that we had a guided tour, we didn't get to see those. One of them contains a map that has the first recorded label of 'America' on it.