I have the book, and it is fantastically well written and easy to follow. I just signed up -- does anyone know if they send an email or something?
"This class does require some abstract thinking and mathematical skills. However, it is designed to require fairly little background, and a motivated student can pick up the background material as the concepts are introduced. We hope that, using our new learning platform, it should be possible for everyone to understand all of the core material."
and "For additional depth, you can refer to the best-selling textbook, _Probabilistic Graphical Models: Principles and Techniques_ by Daphne and Nir Friedman."