Hello? Thank you for leaving your feedback. Since there is a Korean translated textbook available on the market, I did not create separate PDF lecture materials. While that textbook had a good reputation, it's true that it was quite thick and difficult for self-study, but at the time of creating the course, there wasn't a situation where I needed to create lecture materials to replace that textbook. Subsequent courses like the Python Fast Track Course provide lecture notes in Jupyter Notebook format. However, I do not have plans to create additional lecture notes for courses that have already been completed. I will take your feedback into consideration when creating future courses. Thank you.