Well, I learned a great deal from this book that I finished reading, but I'll have to use it again next smester. I am glad that I finished reading it and will not have to read it much in 2012. I have a reading OCD. I need to finish reading whatever I begin, so it is no wonder that I always finish reading my textbooks. Lucky me. *sarcastic tone* I love reading though, but sometimes, you just need to stop and for me, that's never an option. I am getting off topic, but this book was very useful and easy to understand.