I just started using Safari Books Online. Sweeeet! I can get through a lot of material this way, without adding to the clutter of technical books I already have both at home and in the office. And the way I work with these books, this works better. It is a lot easier, when I am learning about coding something, or administration, to just switch windows than it is to turn my head to a book that I have propped open with a stapler or other such heavy object.