I purchased the Senkotsu Pillow and Basic Book when I took a course certified by the Spine Conditioning Association (to be exact, I received it as a bonus for taking the paid course). It is in excellent condition with no noticeable scratches or stains. Recommended for those who want to learn about spine conditioning or try training using the Senkotsu Pillow. *Senkotsu Pillow is not included. ＜Product Overview＞ 【Content Introduction】 This book is an introductory guide to learning the basics of spine conditioning. It is packed with information useful for exercise therapy and posture improvement, and is suitable for a wide range of people, from beginners to advanced users. 【Author Information】 The author is a specialist (founder) of the Spine Conditioning Association, and the content is characterized by practical knowledge and experience. - Title: SEBONE CONDITIONING BASIC BOOK - Publisher: General Incorporated Association Spine Conditioning Association - Price: ¥1,500 (excluding tax) - Number of pages: 28p - URL: https://www.sebone.org/ Thank you for viewing. Please refrain from purchasing if you are sensitive to items stored at home. #Stretch #SmartphoneNeck #LowerBackPain