That's a good way to phrase it, and it makes me question my own approach. I've been sorting things into fiction and non-fiction, but what you're saying suggests it's more about why you're reading. Are you there for the words themselves, or just to get to the point? With someone like Tolkien, you're absorbing the language. But with a thriller or a business book, you're mostly focused on the information or plot beyond the sentences.

Reading a couple of books weekly, and switching between these reading styles, also makes me think the reading speed should be set per book, not as a general setting. If you're reading Tolkien at 250 words per minute and a fast-paced paperback at 450, you shouldn't have to adjust the speed every time you pick up a different title. Since it already tracks where you are in each book, remembering the reading speed for each one seems like a logical next step.

Anyway, that's a really helpful point.