I live in Montgomery County, Maryland just outside Washington, DC. I was looking through our Library's catalog on their website, and I entered "Adobe Premiere CS5" in the search field. The book "Adobe Premiere Pro CS5 Classroom in a Book" popped up on the list, which is cool, but it's not actually at my library. It's accessible through Safari Books Online, which is a service my library system has paid for. While I don't have access to the video content that comes with the actual book, I can read the whole book online whenever I'd like - for free!
My point in posting this is your public library system may offer you access to this service as well. It's worth looking into.
Great tip! Thanks for sharing the idea.