"Liars and Outliers" is a book by Bruce Schneier that explores the complexities of trust in society. It examines how individuals navigate the balance between honesty and deception, highlighting the role of social norms and incentives in shaping behavior. The book categorizes people into different groups based on their honesty, including "liars" who deceive and "outliers" who act outside societal norms. Schneier argues that understanding these dynamics is crucial for creating systems that promote trust and security in various contexts, such as cybersecurity and social interactions.