There is a recent documentary video from Australian television that focuses on Google. You can watch it here in 5 parts. Thank you to Andy Beal for pointing out the link. It looks like it was filmed late last year as it talks a lot about book search and the surrounding issues.
It is an interesting video, not much new was learned by me however. The possible exception is that the founders tried to sell the idea several times and were told no, our search does 80% of what yours does. Sounds like there is something to be learned here though, to me it is that the web is about storing useful and accurate data to improve the customer experience as well as create value and trust. I love to be involved in listening and solving these types of issues and improving the customer experience.