A book providing the latest practical knowledge on sleep. - Title: The New Common Sense of Sleep - Author: Takeshi Sakurai - Publisher: Shinsei Publishing - Price: 1500 yen - Contents: A practical book to make the most of 1/3 of your life - Theme: Sleep - Feature: Daytime sleepiness is a sign of "abnormality" I have only read it once. I used a book cover, so there are no scratches or stains. Due to work, it may take some time to ship. Thank you for your understanding. Thank you for looking.