Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Absolutely Terrible

This is the worst textbook that I have ever read. The authors make way too many assumptions in deriving their equations. Also, their approximations seem very sketchy and go without proper justification. All of these assumptions and approximations make it near impossible to understand anything, and so the student is just left with a bunch of meaningless equations. The end-of-chapter problems and excercises thus become just plug-and-chug, and they teach the student absolutely nothing about semiconductor devices. The problems are only difficult in that the student must search through the 150 or so gigantic equations in each chapter to find the correct one to plug the numbers into. No insight is gained.