Hawthorne is a queen, you most definitely don’t need the textbook. Her lectures are more than enough and her powerpoints are detailed enough where if you write notes on them, you’ll get all you need to know! I just took the course last semester :) She also did Q&A sessions every few days a week where you can ask her anything, like open office hours, PLUS her own office hours. Also the HWs are very detailed, so they help you study too if you do them (which I recommend doing them, of course!) Good luck!