Wow. It's a real shame that this book costs so much. The explanations of classical set theory and fuzzy set theory are simple, clear, and not too hard to understand. I would have liked to have seen some answers to selected problems in this text. Still, for anyone who wants to learn fuzzy set theory or review the basics, here is a very excellent place to go.The book discusses alpha cuts, strong alpha cuts, classical set theory, fuzzy set theory, classical relations, fuzzy relations, classical logic, multivalued logics and their fuzzy systematization, and more. It also contains a short reference list for further study.