Netflix has a series of movies that you can watch on your computer for no additional cost to your subscription if you are a Netflix member. There is a documentary called "Stone Reader" that is available as a movie to watch instantly at Netflix.
The "Stone Reader" documentary receives very strong reviews. People either love it or hate it. Roger Ebert gave the movie 3.5 stars out of 4 in his review of the documentary.
The New York Times has an interesting article about the documentary and the book that the documentary is focused on. You can find the NYT article here.
So if you subscribe to Netflix you can watch the movie without having to wait for it to arrive in the mail. If you don't want to watch the movie on your computer it is also available on DVD from Netflix. Blockbuster also has the movie on DVD if you subscribe to their service. And don't forget your local library they probably have it to.