The authors Matteo Collodel and Eric Oberheim take the reader on a journey through the early life of the famous Austrian philosopher Paul Feyerabend, whose groundbreaking work Against the Method forged new paths in the philosophical understanding of science.  Collodel and Oberheims book contains the translated correspondence of Feyerabend (1924-1994) with equally influential philosophers and scientists of the time, including Rudolf Carnap, Herbert Feigl, Carl G. Hempel, J.J.C. Smart, David Bohm, and Thomas Kuhn.  This book offers an entirely unique approach to the philosopher Paul Feyerabend. Informative, challenging and profound, it immerses the reader deeply in the mind of a truly revolutionary philosopher of science. The main focus lies on the explanation of Paul Feyerabends ideas on logical empiricism and quantum mechanics, which he developed especially in the 1960s. In order to appreciate the celebrated work of the philosopher, it is important to create an understanding of these formative years in Feyerabends life and work. Anyone who knows similar discussions, like the paradigm shift of Thomas Kuhn, or has a passion for history, philosophy and science will be fascinated by the works of Paul Feyerabend. As scientists and followers of Feyerabend, Collodel and Oberheim strive to pay respect to the philosopher and to make his work accessible to a whole new generation.