William Lidwell is the Chief R&D Officer at Avenues: The World School, where he leads teams tasked with conducting research in education and the learning sciences; the development of new educational curricula, programming, and technologies; and the architecture and design of new campuses around the world. The co-author of Universal Principles of Design and The Pocket Universal Principles of Design, he has written other books in a variety of disciplines, including design, education, and management. His online lectures on the psychology of color are available at TheGreatCourses.com, and his online courses on the universal principles of design and logo design are available at LinkedInLearning.com. He lives in Houston, Texas.