Literature, most generically, is any body of written works. More restrictively, literature writing is considered to be an art form, or any single writing deemed to have artistic or intellectual value, often due to deploying language in ways that differ from ordinary usage.
The death of Dr. Hudson is a loss to the republick of letters.
William King, letter (Jan. 7, 1719). Same phrase occurs in the Spectator. Commonwealth of letters is used by Addison, Spectator, No. 529. Nov. 6, 1712.
That doesn't matter. Don't you give up on this [library] card. Because books can be solid gold. Yeah, the great ones have gotten us through the nights for centuries. Just give a writer an hour to hook you and if he can't wish him the best of luck and find someone else.
It is right for you, young men, to enrich yourselves with the spoils of all pure literature; but he who would make a favorite of a bad book, simply because it contains a few beautiful passages, might as well caress the hand of an assassin because of the jewelry which sparkles on his fingers.