As mentioned earlier today there will be no textbook for this class. However, as some of you likely want a textbook to serve as a study aid I've added two possibilities at the top of the Class Books widget on this site. There are also some very inexpensive versions of these books available electronically. No textbook covers all of the material presented in class, so class notes remain the gold standard. Later in the semester I will also make a wiki available to registered students that covers the essentials.