The two books offered on the AMSN website Academy of Medical-Surgical Nurses (AMSN) - Nurses Nurturing Nurses
are very good. There is also another book that is full of test questions. They closely resemble what you will see on the test. I'm really happy I spent the time and money on those books.
Edit to add, this is the other book found on Amazon. I see they have a new one, but the link is for the one I used. http://www.amazon.com/Springhouse-Re...e+nursing+book
If you have any questions feel free to pm me.