I have the SU for dummies book, and got it after I had some experiencience with the program. The information in the book is nicely organized but I did not see anything of consequence that I had not already seen (and learned) from the tutorial materials that can be found on the web. After watching the tutorials (they are mostly videos), I got other questions answered on the google group devoted to SU. The folks on that group are as friendly as those here and you can get help on any question you ask.
Ken