"The Design of Everyday Things" is a book by Don Norman that explores how design impacts usability and user experience. It emphasizes the importance of creating products that are intuitive and easy to use, highlighting the relationship between design and human behavior. Norman introduces concepts like affordances and signifiers, which help users understand how to interact with objects. The book critiques poor design choices and offers principles for improving everyday items, making it a valuable resource for designers, engineers, and anyone interested in enhancing usability in their work.