The book concludes with an 80-item bibliography accompanied by notes on sources of further information on the topics and theorems of each lecture. The book gives a concise, elegant introduction to fundamental concepts, techniques and theorems in variational analysis and will be helpful for both graduate students and more experienced researchers in the field. (Doug Ward, Mathematical Reviews, May, 2023) This is a very nice book and can be recommended to everybody who is interested in variational analysis. All along the book, we see an effort to make accessible sometimes difficult notions and proofs, this book being a model to follow when preparing a graduate course. (Nicolae Cîndea, zbMATH 1490.49002, 2022)