The author writes in a sort of old fashion manner. I'm pretty sure one of the characters said “hitherto“ at some point, so the language is pretty old fashioned. I think the author purposefully made the way they talk a bit more old fashioned, so that it seemed more medieval or something. He also came up with at least one language which is pretty cool. There are also a lot of poems and songs, which is interesting.
I just started The Return of the King so not much has happened yet. The whole thing with Lady Eowyn is kind of weird though. I like that she brought up how they don't want her to fight since she's a woman, but I don't like how part of the reason she wants to fight is to go with Aragorn. I'm hoping she'll get to fight later in the book. Hopefully Merry and Pippin will also be reunited, but now they've both sworn themselves to different lords.