The Fuzzification of Systems The Genesis of Fuzzy Set Theory and its Initial Applications - Developments up to the 1970s

From the reviews:

"Seising follows historically and contextually fuzzy set theory and its early applications by telling the story of Lotfi Zadeh, who coined the term ‘fuzzy set’ in 1964. This book is both a scientific reading and a biography; it attempts (and succeeds) to shed light on the (historic) context of the inception of this theory … . Summing Up: Highly recommended. Upper-division undergraduates through professionals." (G. Trajkovski, CHOICE, Vol. 45 (5), January, 2008)

"The book is certainly a valuable contribution in that it provides the reader with a lot of historical data, references, and figures. The author has patiently collected his material over the years. … the book can serve as a useful source describing many historical events related to the history of fuzzy sets." (Radim Belohlávek, Mathematical Reviews, Issue 2009 e)