Personally I am saddened by this trend to do all online teaching with videos, so I am glad to hear people still write textbooks. I hope you can be successful.

Personally I am saddened by this trend to do all online teaching with videos, so I am glad to hear people still write textbooks. I hope you can be successful. Learning by video is so incredibly ineffective, I really don't get why people like it so much. Even coders learn Ruby by video??? I am doing the Stanford AI course and ML Course and it is OK to be kept on track with the weekly scheduled exercises. But I wish I could just read up the stuff (which I occasionally do, but it is not always easy to find the same information in written form). For example, the linear algebra section on Wikipedia seemed to be not that much help.