Whenever I think about ghosts and libraries, I think of the insistent ghostly librarian in Ghost Busters. Someday, one of the shows is going to capture something that vivid and interactive.
Or maybe not.
Also regarding Ghost Hunters: you know you've made it when show comes out on blu-ray - especially when you spend most of your time wandering around in the dark! Season 6, Part 2 comes out on blu in October.