Books by author: The Princeton Language Institute

This is a solid introduction to speed-reading techniques, complete with exercises for self-evaluation. I'm already at a point where I don't subvocalize, and I already read groups of words with one saccade, so I didn't increase my reading speed dramatically by reading this book, but I can vouch that these techniques do work. Most of the time I choose to read at a relaxed pace, but occasionally it's very helpful to be able to power through some reading material.