"The Happiness Project" is a memoir/self-help book written by Gretchen Rubin about her year-long journey to improve her overall happiness and well-being. The book details Rubin's experiences and experiments as she tackles various areas of her life, such as relationships, work, and leisure, with the goal of increasing her happiness. She sets monthly goals for herself, such as focusing on boosting her energy, tackling a nagging task, or being more mindful, and shares her successes and failures along the way. Rubin also includes insights from research on happiness and positive psychology, as well as quotes and wisdom from philosophers and writers throughout history. The book is a relatable and inspiring read for anyone seeking to make positive changes in their life and find more happiness.