Check out these books in print and/or online for further reading on your topic once you've gotten started.
Ruane, Abigail E., and Patrick James. “The International Relations of Middle-Earth: Learning from The Lord of the Rings.” International Studies Perspectives, vol. 9, no. 4, Nov. 2008, pp. 377–394. EBSCOhost, doi:10.1111/j.1528-3585.2008.00343.x.