This book comes with a CD containing additional information (Study Guide, solutions, data files, projects, etc.) you will find useful for this class. The "Study Guide" is a 349-page book of additional information that many students find helpful: more detailed problem solutions, comments on the reading, hints about how to simplify some of the calculations, answers (almost!) to the true/false questions (which will play an important role in the class--in homework, quizzes, and exams), reviews of all of the key concepts, etc. It's well done and useful. Also on the CD are pre-programmed files of data for most computational exercises in the book (in Matlab and other formats). These aren't really needed (they're mostly for small matrices and it may be easier to type them in yourself if you need them), but some people might find them useful.