Alright, I have Cliffs 3rd edition and the 2009 Kaplan Review Notes book, and I am running into some confusion (and fear I might have wasted some time). I just got done drilling away at the 5 kingdom classification system in Kaplan. Unfortunately, I then looked in Cliffs, only to find the 3 domain system.
On the overview sheet I printed off the ADA website (copyright 2011), they have listed "Section II. Diversity of Life (Five-Kingdom System)." I think I'm just going to keep studying the Kaplan five kingdom, but there doesn't seem to be much of a consensus on SDN as to which one is actually worth studying.