Mix letters speed reading training - Version 2.2 Mix letters in the words speed reading training. Speed Reading with Improved comprehension. Read any average 240 page book in 2-3 hours, combining high speed voice with text. Adjust speed for maximum enjoyment. Ideal for high school, college and grad school students and adults of all ages reading up to 300-350 wpm. If you already read faster than this speed, you will want to use the next tool.