"Good Night, Roger: The Magical Sleep Picture Book" List Price: ¥1296 This is a world-bestselling book that is gaining attention for its ability to help children fall asleep in just 10 minutes. I bought it because it was said to be good for putting children to sleep, but in the end, I never read it all the way through and kept it stored away. Please refrain from purchasing if you are concerned about long-term storage. Thank you for your understanding.