A book by Rino Sashihara that teaches how to cultivate a strong mindset to turn things around. - Title: Gyakuten-ryoku (The Power to Turn Things Around) - Author: Rino Sashihara (HKT48) - ISBN: 978-4-06-389850-7 - Publisher: Kodansha - Content: Focuses on how to develop a strong mindset. Thank you for viewing.