Nyx's Library

Nyx's Library
A library set up by the goddess of night, Nyx. She created the library to preserve knowledge for all time, in case of a time where man kind should lose sense of whom they serve. It is said that, within the library, there contains many dark secrets, some of which none is able to find. The library is also guarded by a being simply known as the librarian, who has a legion of imps serving under it to prevent people from stealing anything from the library.

Known contents of the library:
So far, of all the numerous tomes and scrolls, and documents, these rare titles have been found:

give me suggestions please

The librarian
Some, more adventurous souls, have managed to strike up conversations with the mysterious guardian. The following is what their efforts have uncovered:

Age: Won't tell

Employment: Since 2000 before current demon lord

Gender: Female

Married?: 

Total content of the library: Enough to keep a man reading from his teens, all the way through until he's about 40 centuries old. Provided they finish one book a day.

(More to be added)