So, today a new book arrived that I heard about from Andrew H.: TOLKIEN & THE CLASSICAL WORLD, edited by Hamish Wms and published by Walking Tree Press (2021) as volume 45 in the Cormare series. This being a seriously under-explored aspect of Tolkien's work despite the occasional attempt to make some headway (e.g. Reckford's 1987/88 essay or Morse's 1986 book) I v. much wanted to see what these folks had to say. So far haven't had time to do much more than skim the table of contents, but I can already tell the first piece I'm going to read: Michael Kleu's "Plato's Atlantis and the Post-Platonic Tradition in Tolkien's Downfall of Numenor", quickly followed by Lukast Neubauer's "Less Consciously at First but More Consciously in the Revision: Plato's Ring of Gyges as a Putative Source of Inspiration for Tolkien's Ring of Power", then the two pieces comparing Gondor/Rohan with Rome/Germanica: Richard Z. Gallant's "The Noldorization of the Edain: The Roman-Germani Paradigm for the Holdor and Edain in Tolkien's Migration Era" and Juliette Harrisson's "Escape and Consolation: Gondor as the Ancient Mediterranean and Rohan as the Germanic World in The Lord of the Rings".
So, it'll take me a while to get to this, but I expect it to be worth the wait.
I wonder if anyone will explore the Trolls/Cyclopes analogy.