The closest thing you will find to that is in the appendix located after the conclusion of Return of the King. I contains information on what happens with the members of the fellowship after the events of the books. However, it is mostly presented in the form of a timeline so it does little more than say what happens.
Ok. I guess it's too late to edit my last message, but I've found out a little bit more. The 12th volume of the History of Middle-Earth series is supposed to contain a few pages of a story Tolkien had begun to write that took place after the passing of Aragorn. I have yet to start reading any of the books in this series, but it sounds like this is probably the only other thing that can be found regarding events that occur after the books. However, it does not appear that any of the major LOTR characters are involved in the story.
Yes, there is the beginning of the story "The New Shadow" which was supposed to take place in the Fourth Age but there are only some few pages written;
There are also some vague stories about the ending of the world and the Dagor Dagrath, but only as "previews" (or predictions) in other stories, I think.
We know that eventually after ROTK the world will become as it is now. Men have done what Saruman said, industry has taken over, the forests will fall and so forth.
Gandalf had faith in us but it seems our nature won out in the end and all good that was in men ended many centuries ago... well not all good.
Originally posted by BingaBonga
Didn't Christopher Tolkien made a book of all his fathers notes, or something like that. Well, I got the edited version of The Silmarillion, the one that he edited. Exa, I take it you've read it?
Not ONE book... twelve books for the History Of Middle-Earth and the Unfinished Tales 😉
I've read what?
The New Shadow is of course Men making Sauronfangroups and stuff