What is Apocalyptic Literature?

Apocalyptic Lit is any literature that deals with the end of times. If I had to guess, I would think that you will be reading from the sacred texts of all od the major world religions as well as Utopian/ Dystopian lit in a sci-fi vein and probably some mythology.

Any work of fiction that describes the end of the world.

or, it could be this (see the links below, please.)

"Apocalyptic literature was a new genre of prophetical writing that developed in post-Exilic Jewish culture and was popular among millennialist early Christians. "Apocalypse" is from the Greek word for "revelation" which means "an unveiling or unfolding of things not previously known and which could not be known apart from the unveiling" (Goswiller 1987 p. 3). The flaming poetry of the Book of Revelation that is traditionally ascribed to John is well known to many Christians who are otherwise unaware of the literary genre it represents.

The apocalyptic literature of Judaism and Christianity embraces a considerable period, from the centuries following the exile down to the close of the middle ages. In the present survey we shall limit ourselves to the great formative periods in this literature--in Judaism to 200 BC to AD 100, and in Christianity to AD 50 to 35"