Try the new version of Safari Books Online during their Open House — no charge, no strings attached! O'Reilly Media founder Tim O'Reilly is enthusiastic about the benefits of this new release:
"Safari Books Online 6.0 is a complete, bottom-to-top revamping of the original service. The new UI is slicker and faster, with the kind of drag-and-drop goodness that people expect from a modern web application. In addition, we've added some long-requested features that take advantage of the online medium in ways that aren't possible with standalone ebooks."
There has never been a better time to check out Safari Books Online: