This anime follows Iku and her fellow soldiers as they protect various special books and artifacts from the oppression of the Media Enhancement Law Commission.
In the near future in Japan, the Media Enhancement Law has been forced upon the population censoring all books and media.
To protect themselves against the Media Enhancement Law Commission, all major libraries are fully equipped with a military Task Force, who take it upon themselves to protect the books and freedom of media of the people.
The folks at Discotek Media have found some additional distribution for one of their catalog series with the 2015 pickup of the Library War series.
Anime girl punches bear in the face | Library War (2008)