I purchased this, but I never used it. There are no writings or folds. I will be selling this until I move, so if you are considering purchasing, please buy it as soon as possible, or leave a comment. - Title: Tatsuya Ishikawa's Registered Sales Representative Text & Workbook - Publisher: KADOKAWA - Price: 2,300 yen - Contents: Includes common characteristics and basic knowledge of pharmaceuticals, the structure and function of the human body, the effects of major pharmaceuticals, understanding of regulations, and content useful for exam preparation. - Author: Tatsuya Ishikawa Thank you for looking.