The History of Middle-earth
The Notion Club Papers is an abandoned novel by J. R. R. Tolkien, written during 1945 and published posthumously in "Sauron Defeated", the 9th volume of "The History of Middle-earth". It is a time travel story, written while "The Lord of the Rings" was being developed. The Notion Club is a fictionalization of (and a play on words on the name of) Tolkien's own such club, the Inklings.