It seems that textbooks are provided during the offline training. Is there a way to purchase them? I am currently learning by watching YouTube videos. While the menus are easy to use compared to other CAD software, I think I could learn even more easily if I had a textbook. There are patterns on the pattern market based on the textbook's dimensions, and I would like to try drawing the patterns by following the steps one by one while looking at the textbook. I really want to learn pattern making as a second career.