I could never be a speed reader, although I’d love to have that ability. When I read, I have a mental voice. In my mind’s ear, I can hear the words being spoken. That’s a major mental block to speed reading. However, it gives me a powerful tool.
When I read, I’m in tune to the beat and rhythm of the English language. Yes, every language has one. Maybe that’s why I can speak Spanish and French and fool a native for a few minutes. It’s the beat, rhythm, and voice inflections, that make English so powerful (Yes, I’m perfectly aware of Chinese having those qualities as well). In English, you not only have the stressed syllable in a word, but sometimes there are also a second stressed and a half-stressed syllables as well.

Photo: Ky Olsen used under creative commons license.
Of course there are numerous books out there…