I saw/read somewhere that Tolkien intended at some point to write another book on Middle-Earth,in the fourth age?Is it true?Does anyone know anything about it?Thanx.
Yes, Tolkien did begin writing a sequel to The LOTR. It was called: The New Shadow. It was going to be about a resurgence of the Cult of Morgoth, some 200 years after the War of the Ring, during the reign of Eldarion. It was abandoned after only a few pages, but you can read it in The Historys of Middle Earth: The Peoples of Middle Earth.
: "...of course, I discovered that the King's Peace would contain no tales worth recounting; and his wars would hold little interest after the overthrow of Sauron; and that almost certainly a restlessness would appear about then, owning to the (it seems) inevitable boredom of men with the good..."