Skeptic's Primer
Dr. Roy Spencer has a nice primer on what climate skeptics do, and as importantly, don't believe ( a lot of straw men are being set up and knocked down recently, a tried-and-true practice of people under fire). Good for those relatively new to the topic, though you can find most of this in more detail in my most recent video.
Here is a link to JoNova's site where she has the Skeptics Handbook Vol I and II. Very good read.
http://joannenova.com.au/global-warming/