This is a movie for when you really just want some mindless entertainment.
The library contains a myriad of books as well as lost treasures such as the Ark of the Covenant and Pandora's Box. The librarian is the super smart custodian who is called on to save the world by stopping the baddies from assembling all parts of the Spear of Destiny. Hardly any tension and pretty fake fighting scenes, but a bit of harmless low key fun.