Interesting, I haven't noticed writing style being especially challenging. Mostly because I'm not a native english speaker and read a lot of fantasy/sci-fi/etc books in english. They _all_ start off like "and then gromulars grokled grampors and fiddled fibbles flamboyantly" for several chapters. Then two things start to happen at the same time -- 1: author gets tired of introducing new things in fancy ways and goes on with the plot, and 2: reader slowly gets used to terms and concepts that are relevant enough to be used in the rest of the book.