Textbook of Design Thinking and Innovation is a clear, structured, and practice?oriented guide to mastering creative problem?solving in today's complex and fast?changing world. Designed for engineering students, management learners, researchers, and professionals, these textbook bridges theory and practice to help readers develop a powerful design-thinking mindset. The book begins with the fundamentals, introducing the principles and philosophy of design thinking and contrasting them with traditional problem?solving approaches. It then presents the complete design thinking process?empathy, problem definition, ideation, prototyping, testing, and iteration?supported by practical techniques and real?world relevance. Specialized frameworks such as storytelling, creativity tools for engineers, and modern design technologies further strengthen the learner's ability to innovate effectively. Moving from methods to application, the text explores advanced techniques including SCAMPER, biomimicry, sustainable design, service design, and systems thinking, demonstrating how design thinking drives product and service innovation. Dedicated chapters guide readers from invention to market implementation, research methodology and ethics, intellectual property rights, and patent filing in India, ensuring holistic professional readiness. A capstone section brings everything together, taking learners from problem identification to a persuasive innovation pitch. Blending creativity, rigour, and real?world focus, this textbook is an essential resource for building innovative solutions with impact.