The novels of Dickens, Dostoevsky, Dumas, Hugo and others never seem to go out of popularity.
The Greek classics such as Homer’s writings even today enjoy lot of attention.
Similarly, the Indian epics of Ramayana, Mahabharata and Puranas, not to mention the scriptures such as the Vedas seem to have plenty of recognition.
Perhaps these works will keep enjoying such fame for posterity.
All these are great examples of the Lindy effect which states that if a thing has been around for a long time, it is likely that it will be around for longer. This applies to things such as books, ideas and technologies.