Lean UX is probably the most popular and successful approach to agile innovation in interaction design. It ideally supports teams in developing customer solutions of the highest customer value and thus optimizing acceptance and value creation for the user. Based on the principles of lean and agility, it combines approaches and techniques from different methods and frameworks to form one big whole. Recently, through the collaboration of leading experts in Lean UX - such as Jeff Gothelf and Josh Seiden - with experts in Scrum, a joint approach was developed that best combines the strengths and application areas of both disciplines. This combination is presented in this book. Scrum.org offers the "Professional Scrum with User Experience (PSU I)" certification to combine the approaches. This book offers both deeper insights into the approach and targeted exam preparation. It deliberately avoids superfluous material and only covers content relevant to the topic.