Chances are, if you are looking at this book you will be taking sheng li's class at UF. There is good news and bad news, however, the good news is only for people who already know semiconductor physics. This book will not teach you much you don't already know, and good luck with the HW! I would recommend this book only to people who need it for sheng li's class because his tests are really based entirely on your ability to memorize the info in this book (no understanding required). Anyone else, go pick something else. There are a million books written by good authors who know what learning is about.