Children's picture books with the theme of emotional growth. - Title: The Mysteries of the Heart: Why? How? Sequel: The Mysteries of the Heart: Why? How? - Publisher: Takahashi Shoten - Price: 900 yen - Price: 850 yen - Content: These books are for children and deal with emotional growth and questions. Thank you for viewing. They are in beautiful condition without any folds, but both books have names written on the inside cover. I have checked them, but I apologize if I have overlooked anything.