I'm not aware of a specific book titled "CAPTAIN FANTASTIC" by an author named Monkey in my training data up to January 2022. It's possible that this book was published after my last knowledge update or is a relatively lesser-known work. Without more information about the book, its author, or its content, I can't provide a detailed description.If you can provide more details or context about the book, such as the author's full name or a brief summary of the story, I'd be happy to help you create