What's the noun for librarians? Here's the word you're looking for.
library
An institution which holds books and/or other forms of stored information for use by the public or qualified people. It is usual, but not a defining feature of a library, for it to be housed in rooms of a building, to lend items of its collection to members either with or without payment, and to provide various other services for its community of users.
A collection of books or other forms of stored information.
An equivalent collection of analogous information in a non-printed form, e.g. record library.
(computer science) A collection of software subprograms that provides functionality, to be incorporated into or used by a computer program.
A collection of DNA material from a single organism or relative to a single disease.