This is a book that introduces training menus specifically designed to improve badminton skills. - Title: Badminton Improvement System - Author: Hideo Takase - Number of pages: 25 pages - Price: 1,500 yen - Contents: Training menus for hitting, movement, doubles, singles, and games. The bottom part of the cover is torn, and cellophane tape has been applied to the back. The corners have some folds from use. Please check the images and understand before purchasing.