The book "How to Make Sense of Any Mess: Information Architecture for Everybody" emphasizes the importance of users being able to navigate, understand, and make sense of information. It highlights the need for users to know how to navigate and have a sense of what is possible based on their needs and expectations. The book also sheds light on the messes that people see but don't talk about, aiming to provide guidance on how to organize and structure information effectively. Overall, the book aims to help users make sense of any information mess they encounter.