"The Anthropocene Reviewed" is a collection of essays written by John Green, where he examines different aspects of the human-centered geological epoch known as the Anthropocene. The book explores a wide range of topics, such as the development of the internet, the impact of plastic on the environment, and the history of the song "The Great Gatsby" by The Mountain Goats. Each essay follows a unique format, as Green rates different phenomena, including everyday things and more profound subjects, on a five-star scale. These ratings serve as a springboard for Green to dive into personal anecdotes, historical facts, and philosophical musings. The book also delves into the concept of humanity's relationship with the environment, as Green reflects on the consequences of our actions and the future of the planet. With his signature style of combining humor, wit, and introspection, Green offers readers a thought-provoking and engaging exploration of the Anthropocene era.