Jarosław Pykacz, born 1952, studied physics and mathematics at the University of Gdańsk and received his PhD in theoretical physics in 1980. He was one of the founding fathers of the International Quantum Structures Association and served as its President in the years 2008 - 2010. He published about 50 papers on logico-philosophic foundations and application of fuzzy sets in quantum mechanics.

• Introduction.- A brief survey of main interpretations of quantum mechanics.- A brief survey of many-valued logics.- Fuzzy sets and many-valued logics.- Many-valued logics in quantum mechanics.- Birkhoff–von Neumann quantum logic.- Birkhoff–von Neumann quantum logic as infinite-valued Łukasiewicz logic.- Perspectives.- The many-valued interpretation of quantum mechanics.

"The book summarizes decades of search of an adequate formulation of quantum mechanics using fuzzy set tools. ... The book is very easy to read; a feature rarely encountered in this field. The historical overview is rather detailed, the author found some forgotten sources and put them in context which is of separate interest. ... it is a good deal of advanced mathematical work which summarizes experience from one epoch of research." (Mirko Navara, zbMATH 1328.81020, 2016)