【Synopsis】 This book proposes the best sleep methods and explains the importance of sleep in daily life. It introduces methods to promote relaxed sleep and reduce stress. 【About the Author】 Mr. Shuta Tanaka is a sleep expert and author of numerous books. His approach, based on his knowledge and experience, is supported by many readers. 【Message to Readers】 This book is a must-read for anyone seeking high-quality sleep. It is packed with tips to improve your daily life. - Title: Investing in Sleep - Author: Shuta Tanaka - Publisher: ACHIEVEMENT PUBLISHING - ISBN: 9784866401872 - Content: Sleep methods - Genre: Health/Medicine Please consider this as a used item. Furthermore, returns and complaints after purchase will not be accepted. Please understand this in advance. Thank you for looking. We look forward to your business.