For me, trying to read The Lord of the Rings books.
I could not keep the names correct in my head - - half the time I thought a word was a character but it ended up being a land region/kingdom. And whether they were good or bad characters. The names were too fancy/fantasy/fantastical for my brain to keep up. I literally had a Rings book fan as a tutor for me while I read the books. (I was told I really needed to read the books before seeing the movies.)