Prof S. Datta is genuine, creative, and fantastic. He makes Learning Solid-State challenging, thrilling, and entertaining. He's surrounded by a Team of Pros at Purdue. He serves up great Lectures, Practice drills, Quizzes, Videos, Notes, Slides, and diagrams. Also, his style is user friendly. He Welcomes you into a lecture and says Goodbye with a Right Hand Salute (Sign of Respect), and "Thanks you for coming to Class !" Innovative, witty, and fresh illustrations, are the Trademarks of Dr. Supriyo Datta. He succeeds at delivering the key points of a college course in a couple months. Highly recommended for Scientists, Teachers, Technicians, engineers, and Technologists of every age. Prof Datta is supreme !