books that don't describe every button: Ubuntu Linux for non-geeks:
Also when you boot the system from the live cd there is a blue button with a question mark in the top panel when you click on it, it opens a menu. one of the options on the menu is "New to ubuntu" there it has tutorials and information for new users.
Also the entire help menu from the blue button is also available here at the ubuntu wiki...
there hope that helps!!
I just realized I responded to this post twice with pretty much the same suggestion...