The Ninja Life Hacks Emotions and Feelings 8 Book Box Set by Mary Nhin is a collection of eight books focusing on different emotions and feelings. Each book in the set covers a specific emotion, such as anger and influence, and offers practical life hacks to help individuals manage their emotions in a healthy and productive way. Published in 2020, this box set is written in English and is a valuable resource for those looking to improve their emotional intelligence and well-being.