Christopher Tolkien, son of The Lord of the Rings author JRR Tolkien, died at the age of 95. The Tolkien Society announced this on Twitter on Thursday.

It is not known what the author died of.

Christopher Tolkien was also a writer himself and continued the work of his father by posthumously editing and publishing unreleased works. These include The Silmarillion, Unfinished Tales, Beren And Lúthien and The History of Middle-Earth. He also drew the maps that show the world of Middle-Earth.

Christopher, born in 1924, was the third and youngest son of the world-famous writer, who died in 1973. He was known for his criticism of the film adaptation of The Lord of the Rings . He found that his father's book was "destroyed" and that it had "become an action film for 15 to 25 year olds," the author said in conversation with Le Monde .

About his father, he said he was "made into a monster, devoured by his own popularity and absorbed by the absurdity of our time." He criticizes the commercialization of the books that have "destroyed the aesthetic and philosophical impact of his creation."