Nicomachean Ethics is a book that was written by the philosopher Aristotle. It talks about how to be a good person, what it means to have a good life, and how to make ethical decisions. It is divided into 10 books, and it talks about virtues, habits, reasoning, pleasure, relationships, and more. Aristotle believed that in order to lead a happy and successful life, people should develop good habits and practice virtues such as courage, wisdom, and kindness. He said that we should all make our own decisions based on our own reasoning, and not try to imitate or copy what other people do. Finally, he said that it was important to enjoy life and the pleasure it brings, but to also recognize that moderation is key. So, in short, Nicomachean Ethics is all about finding balance in life and learning how to make the best decisions.