I enjoyed Toshokan Senso (Library War) but I’m not sure about Tatakau Shisho: The Book of Bantorra, as some of the characters seem to be having issues with their cleavage. Here’s the summary from Sea Slugs Anime Blog:

In a world where “Books” are the crystallized forms of the dead, Tonisu has his memory erased and a bomb implanted in his chest. Books are stored in the Bantorra Library where anyone who reads a book can learn their past. Bantorra Library is maintained by Armed Librarians who wield psychic powers and their enemy is a religious society known as Sindeki Kyoudan. Tonisu is ordered to kill the most powerful armed librarian Hamyuttsu Meseta. However, he falls in love and is caught up in the ongoing battle of the library.

Here’s a link to one of the promo trailers.