This work offers useful algorithms, classifications, and other general points to statisticians or quantitative scientists. But, it is also really useful to regulatory affairs managers, clinicians, medical writers, and all kinds of decision-makers in the industry. (Andrei Myslivets, ISCB News, Vol. 68, December, 2019) It is presented in a concise, structured, friendly, and illustrative way that allows for a good understanding of the underlying ideas . the book from Chuang-Stein and Kirby is a valuable, interesting and easy read for statisticians and clinicians with some methodological background who are involved in clinical development or drug approval and who are looking for a structured way to make clinical development decisions. (Norbert Benda, Biometrical Journal, Vol. 61 (4), July, 2016)