Use a pointer

Using a pointer can be particularly useful in reading physical books.

Because our eyes move in steps ( they don't move smoothly on their own ). But if eyes follow a pointer or finger while going through the book it'll turn into smoother movements and save a lot of time.

Gamify reading fast

Sometimes when reading gets boring, then you can gamify the whole experience, like let me see how must fastbcan I read this book without affecting my comprehension of the subject.

It would make the whole experience a lot of fun and interesting.