They apparently read 100 books in a single year. How does one accomplish that? I think the most I've ever managed to read was two books in a single week. That was light reading though and I was traveling with lots of downtime.
If your reading speed isn't up to par, just set aside an hour or two a day to read; the more you read, the faster you'll get over time. I used to read several books a week when I was a kid, and that amount really helped contribute to my reading speeds today, I think. :)
Maxing at 200wpm is absolutely fine. All that (imo) matters, is it's a total waste - and a mentally taxing one at that - to spend those words/minutes reading crap & looking at adverts!
Edit: no rudeness intended to the fast readers ITT!
You have to concentrate on your breathing, focus on your muscles, maintain your form. And on top of it, you are listening to an audiobook ? That is crazy.