"The Design of Everyday Things" by Don Norman is a seminal work that delves into the cognitive psychology behind effective design. The book emphasizes the importance of user-centered design and how understanding human behavior leads to better product usability. Norman illustrates how thoughtful design can enhance user experience, while poor design can lead to frustration and errors. Through engaging examples and practical insights, the book explores fundamental principles such as affordances, signifiers, feedback, and constraints. It serves as a foundational text for designers, engineers, and anyone interested in creating intuitive and user-friendly products. The revised edition updates these concepts for the modern era, incorporating new technologies and design challenges.