I have been actively reading something since my sophomore year of college (2005). After all this time I have noticed a rhythm to my reading. There seems to be three stages the setup, the story, and the climax and with each stag my reading habits change with them.
At the start (say first 75 pages) I am a very slow reader, almost embarrassingly slow, and I tend to read in short bursts of about 20 minutes . I always attributed this to being rusty or not being in the right sense of mind, however, I have been actively reading for 5 and a half years. When starting a story there is a lot of information to absorb including: characters, relationships, culture, setting, background, and the author’s style. The first 75 pages are providing that information and reading slower in short sessions allows for the absorption of that material.
Once in the middle I am in a pretty good groove a.k.a cruise control. I got the background, the characters are all in order, and I have a grasp of the authors style. I am reading in longer sessions and much faster.
This is when the book is getting really good and the climax is just within sight. At this point I am reading at my fastest pace and reading for 1 to 1.5 hours at a time. Staying up an extra hour before bed to get that last chapter in.
Once it is finished I have a few emotions in this order enjoyment (man that was good), pride (eff yeah I just read the shit out of that book), sadness (it over, lame), and excitement (what am I going to read next!).