I have nothing to add to the font aspect but here's fellow HNer's advice how to approach these books: https://news.ycombinator.com/item?id=20859569
The first Dune is the result of research and thinking. Great care went into it. Every subsequent book is more and more of "oh, here's a sequel". I can't remember anything after God Emperor which in itself was a slog bordering of abysmally bad.
So:
- Dune. Yes. It's slow, long, but ultimately very good
- Dune Messiah. Maybe
- Children of Dune. Can already be skipped
- Skip the rest of the series, they are not worth it. At all
YMMV :)