I have some free time this summer and would like to read something to prepare for the "Advanced Data Analysis" course I will be taking. This second level course, according to the course catalog, covers "alternatives to ordinary least squares, influence and diagnostic considerations, robustness, special statistical computation methods." A graduate-level regression analysis course (which I have already taken) is prerequisite. There will be no required text for the class.
I would also consider viewing free online lectures or taking free online courses if there are any recommendations in that area. Please keep in mind that this is a second-level graduate course, which means many online resources I've found (especially free courses and video lectures) are too basic to be of use.