Two books exploring happiness through self-improvement and a scientific approach. Please comment if you'd like to buy them separately or combine them with other books. - Title ❶ Self-Reset! Infinite Zero Power Miracles happen when you return to your true self! - Author: Keiko Ochi - Features: Content related to self-improvement Price: 1450 yen (excluding tax) - Title ❷ 99.9% are Happiness Amateurs - Authors: Ayumi Hoshi, Takashi Machino - Features: Exploration of happiness through a scientific approach Price: 1400 yen (excluding tax) Both books have been read only once, but please understand that they are not new and have been stored at home. * As shown in the third photo, there are black specks that look like dust, and it also looks like part of the original printing. I'm not sure if it's dirt or something else. Please be aware of this. Please feel free to contact me if you have any other questions.