The CSSE 120 textbook is Interactive Programming in Java, by Lynn Andrea Stein, 2003. This text is an electronic textbook, with links inside it to supporting materials. We are grateful to the author for permitting us to use her textbook in this innovative form.
If you want paper copy of the textbook, you may purchase it from your instructor for the cost of duplication ($5 for each third of the textbook, or $15 for the entire textbook).
This required textbook is the model for the course. Read the online PDF version of the text simply by following the above link.