Online Textbooks

EconPhD forever! :-)
http://www.econphd.net/notes.htm

I took the Intro to Economics class as a freshman at CMU. The workbooks in the online courseware are very similar to the experiments that we did in class. Everyone in class participated in the experiments; doing well in the experiment required knowledge of the economics principles behind the experiment as well as a little luck/bargaining skills. Those students who performed the best in each experiment won prizes. I liked the course (and the experiments) so much that I did my humanities concentration in economics and was a TA for the course as a senior. (And, as you can see, I read academic economics blogs despite the fact that my career in computer science has little to do with academic economics.) It wasn't until I was a graduate student with many years of coursework under my belt that I realized: (a) just how much work the professor had put into making the course interactive, interesting, and challenging, and (b) I should have taken advantage of the professor's offer to have lunch with his students. He was a really neat guy.

www.gametheory.net has a list of text books (some online) some of which relate to economics, all of which relate to game theory

Here's something worth a visit: http://www.bized.ac.uk/