Don't intend to burst anyone's bubble. But the textbook itself isn't good enough. It would consist more of 'self-learning, and research'. What you should do is have a read of the syllabus, and look up those specific topics in your textbook, then if you require more information search on the internet. I've purchased many textbooks, and a lot of them cover the core topics, but fail to explain it so we can understand.
I always wanted to learn maths in-depth, but a way I would understand it if the formula was provided with step by step example of how it's used, and calculates the answer. For SDD it's similar.