If you live in NYC, or close enough to get to it, there's a Tolkien exhibit at the Morgan Library.
https://www.vulture.com/2019/01/tolk...441.1539257838
The linked article shows an image (alas, way too small to read) of Tolkien's own map, that he pieced together out of sheets of paper and referred to while writing LotR. It's apparently more detailed than Christopher's (admittedly beautiful) map that appeared in the hardcover books.
If any of you can get to the exhibit, I'd love to see a review.