4th Age
 

This has been on my mind recently, are there any works by Tolkien concerning the 4th Age?

There was one abandoned work by Tolkien set in Gondor during the Fourth Age, after Aragorn died (during Eldarion's reign). It's only about 12 pages long and can be found in Part Three of The Peoples of Middle-Earth (HoME 12) under the title 'The New Shadow'. Basically it's about a couple of Gondorian kids who are bored and start acting like orcs and creating havoc. Tolkien disliked the story and discontinued it, as he didn't see it able to be portrayed as anything but a 'cheap thriller'. Worth a read, though. In fact, I think you can even read it somewhere online. Hope that helps :).

If anyone perchance has a link to where that story can be found on the Internet, I would love to have it. Volume 12 of HoME is one of the few that my library does not possess, and I have been dying to read "The New Shadow" for a long time.

Found it!
 

Here.

The link above didn't quite work for me so I'll put another link here.