I am preparing to take the CNOR in 6 days. I ordered the Standards book, the study guide and the CD-ROM with additional practice test questions. I was disappointed with the CD. There were only 100 questions. I paid $44.95 through the AORN website. The edition was 2008 and of course I got the 2009 standards book, so none of the references for the questions matched the newer edition. I recommend just sticking with the study guide. Good luck to you all, Troy