Our primary text is an online text created by Dr, Robert Stewart from Texas A & M University.
It's a great resource and fairly up to date and it's free. Thank you Dr. Stewart!!
The are a few broken links in the text; some can be fixed with an easy modification:
For example the link :
http://oceanworld.tamu.edu/resources/environment-book/abruptclimatechange.htm#feedback is broken
(add an E right before the last .htm and change the last htm to html)