Question: When were lord of the rings books written?
Disambiguated questions and answers: question: When was lord of the rings books started?
When was lord of the rings books finished being written?
When was the fellowship of the ring written and published?
When was the two towers written and published?
When was the return of the King written and published?
answer: December 1937
1949
29 July 1954
11 November 1954
20 October 1955
Natural Questions answer: between 1937 and 1949 (from the Wikipedia article "The Lord of the Rings")